Decompile trainer_data engine code

10 files changed, 431 insertions, 773 deletions

diff --git a/arm9/arm9.lsf b/arm9/arm9.lsf
index 29b8e407..6abd904a 100644
--- a/arm9/arm9.lsf
+++ b/arm9/arm9.lsf
@@ -246,9 +246,11 @@ Static arm9
 	Object unk_02064E90.o
 	Object unk_020653EC.o
 	Object unk_02066840.o
+
+	##poketool##
 	Object pokemon.o
 	Object waza.o
-	Object unk_0206ABC4.o
+	Object trainer_data.o
 	Object pokemon_storage_system.o
 	Object unk_0206B688.o
 	Object party.o
@@ -259,6 +261,8 @@ Static arm9
 	Object unk_0206DE24.o
 	Object unk_0206E0F0.o
 	Object unk_0206E2F0.o
+
+	##itemtool##
 	Object itemtool.o
 	Object bag.o
 	Object unk_0206F1F0.o
diff --git a/arm9/asm/scrcmd.s b/arm9/asm/scrcmd.s
index b874b757..affbe1c1 100644
--- a/arm9/asm/scrcmd.s
+++ b/arm9/asm/scrcmd.s
@@ -6376,7 +6376,7 @@ FUN_0203CBE8: ; 0x0203CBE8
 	ldr r0, [sp, #0x0]
 	ldr r2, [r6, #0x0]
 	mov r3, #0xb
-	bl FUN_0206AD4C
+	bl GetTrainerMessageByIdPair
 	add r0, r4, #0x0
 	mov r1, #0x1
 	bl FUN_02039438
diff --git a/arm9/asm/unk_0204653C.s b/arm9/asm/unk_0204653C.s
index b74847fc..4309494e 100644
--- a/arm9/asm/unk_0204653C.s
+++ b/arm9/asm/unk_0204653C.s
@@ -1482,7 +1482,7 @@ _0204711A:
 	ldr r1, [r7, #0xc]
 	ldr r2, [sp, #0x20]
 	add r0, r4, #0x0
-	bl FUN_0206ABC4
+	bl EnemyTrainerSet_Init
 	ldr r0, [r7, #0xc]
 	bl FUN_02029FC8
 	mov r1, #0x8
diff --git a/arm9/asm/unk_0206ABC4.s b/arm9/asm/unk_0206ABC4.s
deleted file mode 100644
index b4b3d88e..00000000
--- a/arm9/asm/unk_0206ABC4.s
+++ /dev/null
@@ -1,749 +0,0 @@
-    .include "asm/macros.inc"
-    .include "global.inc"
-
-	.section .rodata
-
-	.global UNK_020F8010
-UNK_020F8010: ; 0x020F8010
-	.byte 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0
-	.byte 0, 1, 1, 0, 0, 1, 1, 2, 0, 1, 1, 0, 0, 0, 1, 2
-	.byte 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 2
-	.byte 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0
-	.byte 0, 0, 1, 0, 0, 1, 2, 0, 1, 0, 1, 0, 1, 1, 1, 0
-	.byte 1, 0, 2, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0
-	.byte 1, 0, 0, 0
-
-	.text
-
-	thumb_func_start FUN_0206ABC4
-FUN_0206ABC4: ; 0x0206ABC4
-	push {r3-r7, lr}
-	sub sp, #0x48
-	str r2, [sp, #0x4]
-	ldr r2, _0206AC70 ; =0x0000022F
-	str r0, [sp, #0x0]
-	add r4, r1, #0x0
-	ldr r3, [sp, #0x4]
-	mov r0, #0x1
-	mov r1, #0x1a
-	bl NewMsgDataFromNarc
-	str r0, [sp, #0x10]
-	add r0, r4, #0x0
-	bl FUN_02024EC0
-	bl FUN_02024EE8
-	ldr r4, [sp, #0x0]
-	str r0, [sp, #0xc]
-	add r0, r4, #0x0
-	add r5, r4, #0x0
-	mov r7, #0x0
-	str r0, [sp, #0x8]
-	add r5, #0x3c
-_0206ABF4:
-	ldr r0, [r4, #0x18]
-	cmp r0, #0x0
-	beq _0206AC48
-	add r1, sp, #0x14
-	bl TrainerData_ReadTrData
-	ldr r3, [sp, #0x8]
-	add r6, sp, #0x14
-	add r3, #0x28
-	mov r2, #0x6
-_0206AC08:
-	ldmia r6!, {r0-r1}
-	stmia r3!, {r0-r1}
-	sub r2, r2, #0x1
-	bne _0206AC08
-	ldr r0, [r6, #0x0]
-	str r0, [r3, #0x0]
-	add r0, sp, #0x14
-	ldrb r0, [r0, #0x1]
-	cmp r0, #0x3f
-	bne _0206AC26
-	ldr r1, [sp, #0xc]
-	add r0, r5, #0x0
-	bl CopyU16StringArray
-	b _0206AC3E
-_0206AC26:
-	ldr r0, [sp, #0x10]
-	ldr r1, [r4, #0x18]
-	bl NewString_ReadMsgData
-	add r6, r0, #0x0
-	add r1, r5, #0x0
-	mov r2, #0x8
-	bl CopyStringToU16Array
-	add r0, r6, #0x0
-	bl String_dtor
-_0206AC3E:
-	ldr r0, [sp, #0x0]
-	ldr r2, [sp, #0x4]
-	add r1, r7, #0x0
-	bl LoadTrainerParty
-_0206AC48:
-	ldr r0, [sp, #0x8]
-	add r7, r7, #0x1
-	add r0, #0x34
-	add r4, r4, #0x4
-	add r5, #0x34
-	str r0, [sp, #0x8]
-	cmp r7, #0x4
-	blt _0206ABF4
-	ldr r0, [sp, #0x0]
-	ldr r1, [r0, #0x0]
-	ldr r0, [sp, #0x24]
-	orr r1, r0
-	ldr r0, [sp, #0x0]
-	str r1, [r0, #0x0]
-	ldr r0, [sp, #0x10]
-	bl DestroyMsgData
-	add sp, #0x48
-	pop {r3-r7, pc}
-	nop
-_0206AC70: .word 0x0000022F
-
-	thumb_func_start TrainerData_GetAttr
-TrainerData_GetAttr: ; 0x0206AC74
-	push {r4-r5, lr}
-	sub sp, #0x34
-	add r5, r1, #0x0
-	add r1, sp, #0x0
-	bl TrainerData_ReadTrData
-	cmp r5, #0x9
-	bhi _0206ACCC
-	add r0, r5, r5
-	add r0, pc
-	ldrh r0, [r0, #0x6]
-	lsl r0, r0, #0x10
-	asr r0, r0, #0x10
-	add pc, r0
-_0206AC90: ; jump table (using 16-bit offset)
-	.short _0206ACA4 - _0206AC90 - 2; case 0
-	.short _0206ACAA - _0206AC90 - 2; case 1
-	.short _0206ACB0 - _0206AC90 - 2; case 2
-	.short _0206ACB6 - _0206AC90 - 2; case 3
-	.short _0206ACBC - _0206AC90 - 2; case 4
-	.short _0206ACBC - _0206AC90 - 2; case 5
-	.short _0206ACBC - _0206AC90 - 2; case 6
-	.short _0206ACBC - _0206AC90 - 2; case 7
-	.short _0206ACC6 - _0206AC90 - 2; case 8
-	.short _0206ACCA - _0206AC90 - 2; case 9
-_0206ACA4:
-	add r0, sp, #0x0
-	ldrb r4, [r0, #0x0]
-	b _0206ACCC
-_0206ACAA:
-	add r0, sp, #0x0
-	ldrb r4, [r0, #0x1]
-	b _0206ACCC
-_0206ACB0:
-	add r0, sp, #0x0
-	ldrb r4, [r0, #0x2]
-	b _0206ACCC
-_0206ACB6:
-	add r0, sp, #0x0
-	ldrb r4, [r0, #0x3]
-	b _0206ACCC
-_0206ACBC:
-	sub r0, r5, #0x4
-	lsl r1, r0, #0x1
-	add r0, sp, #0x4
-	ldrh r4, [r0, r1]
-	b _0206ACCC
-_0206ACC6:
-	ldr r4, [sp, #0xc]
-	b _0206ACCC
-_0206ACCA:
-	ldr r4, [sp, #0x10]
-_0206ACCC:
-	add r0, r4, #0x0
-	add sp, #0x34
-	pop {r4-r5, pc}
-	.balign 4
-
-	thumb_func_start FUN_0206ACD4
-FUN_0206ACD4: ; 0x0206ACD4
-	push {r4-r7, lr}
-	sub sp, #0x14
-	add r5, r0, #0x0
-	mov r0, #0x0
-	str r0, [sp, #0x4]
-	add r7, r1, #0x0
-	ldr r1, [sp, #0x4]
-	mov r0, #0x3b
-	add r4, r2, #0x0
-	bl GetNarcMemberSizeByIdPair
-	add r6, r0, #0x0
-	mov r0, #0x2
-	str r0, [sp, #0x0]
-	add r0, sp, #0xc
-	mov r1, #0x89
-	mov r2, #0x0
-	lsl r3, r5, #0x1
-	bl ReadFromNarcMemberByIdPair
-	mov r0, #0x3b
-	add r1, r4, #0x0
-	bl NARC_ctor
-	add r4, sp, #0xc
-	ldrh r2, [r4, #0x0]
-	str r0, [sp, #0x8]
-	cmp r2, r6
-	beq _0206AD40
-_0206AD0E:
-	add r0, sp, #0xc
-	add r0, #0x2
-	str r0, [sp, #0x0]
-	ldr r0, [sp, #0x8]
-	mov r1, #0x0
-	mov r3, #0x4
-	bl NARC_ReadFromMember
-	ldrh r1, [r4, #0x2]
-	cmp r1, r5
-	bne _0206AD30
-	ldrh r0, [r4, #0x4]
-	cmp r0, r7
-	bne _0206AD30
-	mov r0, #0x1
-	str r0, [sp, #0x4]
-	b _0206AD40
-_0206AD30:
-	cmp r1, r5
-	bne _0206AD40
-	ldrh r0, [r4, #0x0]
-	add r0, r0, #0x4
-	strh r0, [r4, #0x0]
-	ldrh r2, [r4, #0x0]
-	cmp r2, r6
-	bne _0206AD0E
-_0206AD40:
-	ldr r0, [sp, #0x8]
-	bl NARC_dtor
-	ldr r0, [sp, #0x4]
-	add sp, #0x14
-	pop {r4-r7, pc}
-
-	thumb_func_start FUN_0206AD4C
-FUN_0206AD4C: ; 0x0206AD4C
-	push {r3-r7, lr}
-	sub sp, #0x18
-	add r6, r0, #0x0
-	add r7, r1, #0x0
-	mov r0, #0x3b
-	mov r1, #0x0
-	str r2, [sp, #0x4]
-	str r3, [sp, #0x8]
-	bl GetNarcMemberSizeByIdPair
-	add r5, r0, #0x0
-	mov r0, #0x2
-	str r0, [sp, #0x0]
-	add r0, sp, #0x10
-	mov r1, #0x89
-	mov r2, #0x0
-	lsl r3, r6, #0x1
-	bl ReadFromNarcMemberByIdPair
-	ldr r1, [sp, #0x8]
-	mov r0, #0x3b
-	bl NARC_ctor
-	add r4, sp, #0x10
-	ldrh r2, [r4, #0x0]
-	str r0, [sp, #0xc]
-	cmp r2, r5
-	beq _0206ADC2
-_0206AD84:
-	add r0, sp, #0x10
-	add r0, #0x2
-	str r0, [sp, #0x0]
-	ldr r0, [sp, #0xc]
-	mov r1, #0x0
-	mov r3, #0x4
-	bl NARC_ReadFromMember
-	ldrh r0, [r4, #0x2]
-	cmp r0, r6
-	bne _0206ADB6
-	ldrh r0, [r4, #0x4]
-	cmp r0, r7
-	bne _0206ADB6
-	ldr r0, [sp, #0x4]
-	add r2, sp, #0x10
-	str r0, [sp, #0x0]
-	ldrh r2, [r2, #0x0]
-	ldr r1, _0206ADDC ; =0x0000022E
-	ldr r3, [sp, #0x8]
-	mov r0, #0x1a
-	lsr r2, r2, #0x2
-	bl ReadMsgData_NewNarc_ExistingString
-	b _0206ADC2
-_0206ADB6:
-	ldrh r0, [r4, #0x0]
-	add r0, r0, #0x4
-	strh r0, [r4, #0x0]
-	ldrh r2, [r4, #0x0]
-	cmp r2, r5
-	bne _0206AD84
-_0206ADC2:
-	ldr r0, [sp, #0xc]
-	bl NARC_dtor
-	add r0, sp, #0x10
-	ldrh r0, [r0, #0x0]
-	cmp r0, r5
-	bne _0206ADD6
-	ldr r0, [sp, #0x4]
-	bl StringSetEmpty
-_0206ADD6:
-	add sp, #0x18
-	pop {r3-r7, pc}
-	nop
-_0206ADDC: .word 0x0000022E
-
-	thumb_func_start TrainerData_ReadTrData
-TrainerData_ReadTrData: ; 0x0206ADE0
-	ldr r3, _0206ADEC ; =ReadWholeNarcMemberByIdPair
-	add r2, r0, #0x0
-	add r0, r1, #0x0
-	mov r1, #0x39
-	bx r3
-	nop
-_0206ADEC: .word ReadWholeNarcMemberByIdPair
-
-	thumb_func_start TrainerData_ReadTrPoke
-TrainerData_ReadTrPoke: ; 0x0206ADF0
-	ldr r3, _0206ADFC ; =ReadWholeNarcMemberByIdPair
-	add r2, r0, #0x0
-	add r0, r1, #0x0
-	mov r1, #0x3a
-	bx r3
-	nop
-_0206ADFC: .word ReadWholeNarcMemberByIdPair
-
-	thumb_func_start FUN_0206AE00
-FUN_0206AE00: ; 0x0206AE00
-	ldr r1, _0206AE08 ; =UNK_020F8010
-	ldrb r0, [r1, r0]
-	bx lr
-	nop
-_0206AE08: .word UNK_020F8010
-
-	thumb_func_start LoadTrainerParty
-LoadTrainerParty: ; 0x0206AE0C
-	push {r3-r7, lr}
-	sub sp, #0x50
-	add r7, r1, #0x0
-	add r4, r0, #0x0
-	add r5, r2, #0x0
-	bl GetLCRNGSeed
-	lsl r6, r7, #0x2
-	str r0, [sp, #0x44]
-	add r0, r4, r6
-	ldr r0, [r0, #0x4]
-	mov r1, #0x6
-	bl InitPartyWithMaxSize
-	add r0, r5, #0x0
-	mov r1, #0x60
-	bl AllocFromHeap
-	str r0, [sp, #0x4c]
-	add r0, r5, #0x0
-	bl AllocMonZeroed
-	str r0, [sp, #0x40]
-	add r0, r4, r6
-	ldr r0, [r0, #0x18]
-	ldr r1, [sp, #0x4c]
-	bl TrainerData_ReadTrPoke
-	mov r0, #0x34
-	add r5, r7, #0x0
-	mul r5, r0
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	bl FUN_0206AE00
-	cmp r0, #0x1
-	bne _0206AE5E
-	mov r0, #0x78
-	str r0, [sp, #0x10]
-	b _0206AE62
-_0206AE5E:
-	mov r0, #0x88
-	str r0, [sp, #0x10]
-_0206AE62:
-	add r0, r4, r5
-	add r0, #0x28
-	ldrb r0, [r0, #0x0]
-	cmp r0, #0x3
-	bhi _0206AF26
-	add r0, r0, r0
-	add r0, pc
-	ldrh r0, [r0, #0x6]
-	lsl r0, r0, #0x10
-	asr r0, r0, #0x10
-	add pc, r0
-_0206AE78: ; jump table (using 16-bit offset)
-	.short _0206AE80 - _0206AE78 - 2; case 0
-	.short _0206AF28 - _0206AE78 - 2; case 1
-	.short _0206AFE8 - _0206AE78 - 2; case 2
-	.short _0206B08C - _0206AE78 - 2; case 3
-_0206AE80:
-	mov r0, #0x0
-	str r0, [sp, #0x48]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r0, [r0, #0x0]
-	cmp r0, #0x0
-	ble _0206AF26
-	ldr r0, [sp, #0x4c]
-	str r0, [sp, #0x28]
-	add r0, r4, r6
-	str r0, [sp, #0x24]
-_0206AE96:
-	ldr r0, [sp, #0x24]
-	ldr r2, [sp, #0x28]
-	ldr r1, [r0, #0x18]
-	ldr r0, [sp, #0x28]
-	ldrh r3, [r2, #0x0]
-	ldrh r2, [r2, #0x2]
-	ldrh r0, [r0, #0x4]
-	add r2, r3, r2
-	add r0, r0, r2
-	add r7, r1, r0
-	add r0, r7, #0x0
-	bl SetLCRNGSeed
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	mov r6, #0x0
-	cmp r0, #0x0
-	ble _0206AECE
-_0206AEBC:
-	bl LCRandom
-	add r7, r0, #0x0
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	add r6, r6, #0x1
-	cmp r6, r0
-	blt _0206AEBC
-_0206AECE:
-	ldr r0, [sp, #0x10]
-	lsl r1, r7, #0x8
-	add r6, r1, r0
-	ldr r0, [sp, #0x28]
-	ldrh r1, [r0, #0x0]
-	mov r0, #0x1f
-	mul r0, r1
-	mov r1, #0xff
-	bl _s32_div_f
-	add r3, r0, #0x0
-	mov r0, #0x1
-	str r0, [sp, #0x0]
-	lsl r3, r3, #0x18
-	str r6, [sp, #0x4]
-	mov r0, #0x2
-	str r0, [sp, #0x8]
-	mov r0, #0x0
-	str r0, [sp, #0xc]
-	ldr r1, [sp, #0x28]
-	ldr r2, [sp, #0x28]
-	ldrh r1, [r1, #0x4]
-	ldrh r2, [r2, #0x2]
-	ldr r0, [sp, #0x40]
-	lsr r3, r3, #0x18
-	bl CreateMon
-	ldr r0, [sp, #0x24]
-	ldr r1, [sp, #0x40]
-	ldr r0, [r0, #0x4]
-	bl AddMonToParty
-	ldr r0, [sp, #0x28]
-	add r0, r0, #0x6
-	str r0, [sp, #0x28]
-	ldr r0, [sp, #0x48]
-	add r0, r0, #0x1
-	str r0, [sp, #0x48]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r1, [r0, #0x0]
-	ldr r0, [sp, #0x48]
-	cmp r0, r1
-	blt _0206AE96
-_0206AF26:
-	b _0206B156
-_0206AF28:
-	mov r0, #0x0
-	str r0, [sp, #0x18]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r0, [r0, #0x0]
-	cmp r0, #0x0
-	ble _0206AFE6
-	ldr r0, [sp, #0x4c]
-	str r0, [sp, #0x30]
-	add r0, r4, r6
-	str r0, [sp, #0x2c]
-_0206AF3E:
-	ldr r0, [sp, #0x2c]
-	ldr r2, [sp, #0x30]
-	ldr r1, [r0, #0x18]
-	ldr r0, [sp, #0x30]
-	ldrh r3, [r2, #0x0]
-	ldrh r2, [r2, #0x2]
-	ldrh r0, [r0, #0x4]
-	add r2, r3, r2
-	add r0, r0, r2
-	add r7, r1, r0
-	add r0, r7, #0x0
-	bl SetLCRNGSeed
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	mov r6, #0x0
-	cmp r0, #0x0
-	ble _0206AF76
-_0206AF64:
-	bl LCRandom
-	add r7, r0, #0x0
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	add r6, r6, #0x1
-	cmp r6, r0
-	blt _0206AF64
-_0206AF76:
-	ldr r0, [sp, #0x10]
-	lsl r1, r7, #0x8
-	add r6, r1, r0
-	ldr r0, [sp, #0x30]
-	ldrh r1, [r0, #0x0]
-	mov r0, #0x1f
-	mul r0, r1
-	mov r1, #0xff
-	bl _s32_div_f
-	add r3, r0, #0x0
-	mov r0, #0x1
-	str r0, [sp, #0x0]
-	lsl r3, r3, #0x18
-	str r6, [sp, #0x4]
-	mov r0, #0x2
-	str r0, [sp, #0x8]
-	mov r0, #0x0
-	str r0, [sp, #0xc]
-	ldr r1, [sp, #0x30]
-	ldr r2, [sp, #0x30]
-	ldrh r1, [r1, #0x4]
-	ldrh r2, [r2, #0x2]
-	ldr r0, [sp, #0x40]
-	lsr r3, r3, #0x18
-	bl CreateMon
-	ldr r7, [sp, #0x30]
-	mov r6, #0x0
-_0206AFB0:
-	ldrh r1, [r7, #0x6]
-	lsl r2, r6, #0x18
-	ldr r0, [sp, #0x40]
-	lsr r2, r2, #0x18
-	bl MonSetMoveInSlot
-	add r6, r6, #0x1
-	add r7, r7, #0x2
-	cmp r6, #0x4
-	blt _0206AFB0
-	ldr r0, [sp, #0x2c]
-	ldr r1, [sp, #0x40]
-	ldr r0, [r0, #0x4]
-	bl AddMonToParty
-	ldr r0, [sp, #0x30]
-	add r0, #0xe
-	str r0, [sp, #0x30]
-	ldr r0, [sp, #0x18]
-	add r0, r0, #0x1
-	str r0, [sp, #0x18]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r1, [r0, #0x0]
-	ldr r0, [sp, #0x18]
-	cmp r0, r1
-	blt _0206AF3E
-_0206AFE6:
-	b _0206B156
-_0206AFE8:
-	mov r0, #0x0
-	str r0, [sp, #0x1c]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r0, [r0, #0x0]
-	cmp r0, #0x0
-	ble _0206B08A
-	add r0, r4, r6
-	ldr r7, [sp, #0x4c]
-	str r0, [sp, #0x34]
-_0206AFFC:
-	ldr r0, [sp, #0x34]
-	ldrh r3, [r7, #0x0]
-	ldrh r2, [r7, #0x2]
-	ldr r1, [r0, #0x18]
-	ldrh r0, [r7, #0x4]
-	add r2, r3, r2
-	add r0, r0, r2
-	add r0, r1, r0
-	str r0, [sp, #0x14]
-	bl SetLCRNGSeed
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	mov r6, #0x0
-	cmp r0, #0x0
-	ble _0206B030
-_0206B01E:
-	bl LCRandom
-	str r0, [sp, #0x14]
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	add r6, r6, #0x1
-	cmp r6, r0
-	blt _0206B01E
-_0206B030:
-	ldr r0, [sp, #0x14]
-	lsl r1, r0, #0x8
-	ldr r0, [sp, #0x10]
-	add r6, r1, r0
-	ldrh r1, [r7, #0x0]
-	mov r0, #0x1f
-	mul r0, r1
-	mov r1, #0xff
-	bl _s32_div_f
-	add r3, r0, #0x0
-	mov r0, #0x1
-	str r0, [sp, #0x0]
-	lsl r3, r3, #0x18
-	str r6, [sp, #0x4]
-	mov r0, #0x2
-	str r0, [sp, #0x8]
-	mov r0, #0x0
-	str r0, [sp, #0xc]
-	ldrh r1, [r7, #0x4]
-	ldrh r2, [r7, #0x2]
-	ldr r0, [sp, #0x40]
-	lsr r3, r3, #0x18
-	bl CreateMon
-	ldr r0, [sp, #0x40]
-	mov r1, #0x6
-	add r2, r7, #0x6
-	bl SetMonData
-	ldr r0, [sp, #0x34]
-	ldr r1, [sp, #0x40]
-	ldr r0, [r0, #0x4]
-	bl AddMonToParty
-	ldr r0, [sp, #0x1c]
-	add r7, #0x8
-	add r0, r0, #0x1
-	str r0, [sp, #0x1c]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r1, [r0, #0x0]
-	ldr r0, [sp, #0x1c]
-	cmp r0, r1
-	blt _0206AFFC
-_0206B08A:
-	b _0206B156
-_0206B08C:
-	mov r0, #0x0
-	str r0, [sp, #0x20]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r0, [r0, #0x0]
-	cmp r0, #0x0
-	ble _0206B156
-	ldr r0, [sp, #0x4c]
-	str r0, [sp, #0x3c]
-	add r0, r4, r6
-	str r0, [sp, #0x38]
-_0206B0A2:
-	ldr r0, [sp, #0x38]
-	ldr r2, [sp, #0x3c]
-	ldr r1, [r0, #0x18]
-	ldr r0, [sp, #0x3c]
-	ldrh r3, [r2, #0x0]
-	ldrh r2, [r2, #0x2]
-	ldrh r0, [r0, #0x4]
-	add r2, r3, r2
-	add r0, r0, r2
-	add r7, r1, r0
-	add r0, r7, #0x0
-	bl SetLCRNGSeed
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	mov r6, #0x0
-	cmp r0, #0x0
-	ble _0206B0DA
-_0206B0C8:
-	bl LCRandom
-	add r7, r0, #0x0
-	add r0, r4, r5
-	add r0, #0x29
-	ldrb r0, [r0, #0x0]
-	add r6, r6, #0x1
-	cmp r6, r0
-	blt _0206B0C8
-_0206B0DA:
-	ldr r0, [sp, #0x10]
-	lsl r1, r7, #0x8
-	add r6, r1, r0
-	ldr r0, [sp, #0x3c]
-	ldrh r1, [r0, #0x0]
-	mov r0, #0x1f
-	mul r0, r1
-	mov r1, #0xff
-	bl _s32_div_f
-	add r3, r0, #0x0
-	mov r0, #0x1
-	str r0, [sp, #0x0]
-	lsl r3, r3, #0x18
-	str r6, [sp, #0x4]
-	mov r0, #0x2
-	str r0, [sp, #0x8]
-	mov r0, #0x0
-	str r0, [sp, #0xc]
-	ldr r1, [sp, #0x3c]
-	ldr r2, [sp, #0x3c]
-	ldrh r1, [r1, #0x4]
-	ldrh r2, [r2, #0x2]
-	ldr r0, [sp, #0x40]
-	lsr r3, r3, #0x18
-	bl CreateMon
-	ldr r2, [sp, #0x3c]
-	ldr r0, [sp, #0x40]
-	mov r1, #0x6
-	add r2, r2, #0x6
-	bl SetMonData
-	ldr r7, [sp, #0x3c]
-	mov r6, #0x0
-_0206B120:
-	ldrh r1, [r7, #0x8]
-	lsl r2, r6, #0x18
-	ldr r0, [sp, #0x40]
-	lsr r2, r2, #0x18
-	bl MonSetMoveInSlot
-	add r6, r6, #0x1
-	add r7, r7, #0x2
-	cmp r6, #0x4
-	blt _0206B120
-	ldr r0, [sp, #0x38]
-	ldr r1, [sp, #0x40]
-	ldr r0, [r0, #0x4]
-	bl AddMonToParty
-	ldr r0, [sp, #0x3c]
-	add r0, #0x10
-	str r0, [sp, #0x3c]
-	ldr r0, [sp, #0x20]
-	add r0, r0, #0x1
-	str r0, [sp, #0x20]
-	add r0, r4, r5
-	add r0, #0x2b
-	ldrb r1, [r0, #0x0]
-	ldr r0, [sp, #0x20]
-	cmp r0, r1
-	blt _0206B0A2
-_0206B156:
-	ldr r0, [sp, #0x4c]
-	bl FreeToHeap
-	ldr r0, [sp, #0x40]
-	bl FreeToHeap
-	ldr r0, [sp, #0x44]
-	bl SetLCRNGSeed
-	add sp, #0x50
-	pop {r3-r7, pc}
diff --git a/arm9/global.inc b/arm9/global.inc
index c039fd35..2f9c965b 100644
--- a/arm9/global.inc
+++ b/arm9/global.inc
@@ -4837,13 +4837,13 @@
 .extern GetWazaAttr
 .extern WazaGetMaxPp
 .extern GetAttrFromWazaTbl
-.extern FUN_0206ABC4
+.extern EnemyTrainerSet_Init
 .extern TrainerData_GetAttr
-.extern FUN_0206ACD4
-.extern FUN_0206AD4C
+.extern TrainerMessageWithIdPairExists
+.extern GetTrainerMessageByIdPair
 .extern TrainerData_ReadTrData
 .extern TrainerData_ReadTrPoke
-.extern FUN_0206AE00
+.extern TrainerClass_GetGenderOrTrainerCount
 .extern PCStorage_init
 .extern PCStorage_sizeof
 .extern PCStorage_PlaceMonInFirstEmptySlotInAnyBox
diff --git a/arm9/modules/06/asm/module_06.s b/arm9/modules/06/asm/module_06.s
index 2af29137..f20313a9 100644
--- a/arm9/modules/06/asm/module_06.s
+++ b/arm9/modules/06/asm/module_06.s
@@ -5094,7 +5094,7 @@ _0223BC5A:
 	str r0, [r1, #0x20]
 	ldr r0, [sp, #0x2c]
 	ldr r1, [r5, #0xc]
-	bl FUN_0206ABC4
+	bl EnemyTrainerSet_Init
 	add r0, sp, #0x30
 	str r0, [sp]
 	ldr r1, [sp, #0x20]
@@ -5531,7 +5531,7 @@ _0223BFFE:
 	str r0, [r1, #0x20]
 	ldr r0, [sp, #0x24]
 	ldr r1, [r5, #0xc]
-	bl FUN_0206ABC4
+	bl EnemyTrainerSet_Init
 	add r0, sp, #0x28
 	str r0, [sp]
 	ldr r1, [sp, #0x18]
@@ -5841,7 +5841,7 @@ _0223C2A2:
 	str r0, [r1, #0x20]
 	ldr r0, [r4]
 	ldr r1, [r5, #0xc]
-	bl FUN_0206ABC4
+	bl EnemyTrainerSet_Init
 	add r0, sp, #0x28
 	str r0, [sp]
 	ldr r1, [sp, #0x1c]
diff --git a/arm9/modules/07/asm/module_07.s b/arm9/modules/07/asm/module_07.s
index 2659dd5c..05283e3d 100644
--- a/arm9/modules/07/asm/module_07.s
+++ b/arm9/modules/07/asm/module_07.s
@@ -5049,7 +5049,7 @@ MOD07_02214720: ; 0x02214720
 	add r0, r1, r0
 	add r0, #0x29
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #0x10]
 	ldr r0, [r4, #0x24]
 	mov r1, #0x10
@@ -5101,7 +5101,7 @@ _022147BC:
 	add r0, r1, r0
 	add r0, #0x29
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #0x14]
 	ldr r0, [r4, #0x24]
 	mov r1, #0x10
@@ -5134,7 +5134,7 @@ _02214808:
 	add r0, r1, r0
 	add r0, #0x29
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #0x18]
 	ldr r0, [r4, #0x24]
 	mov r1, #0x10
@@ -5167,7 +5167,7 @@ _02214854:
 	add r0, r1, r0
 	add r0, #0x29
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #0x1c]
 	ldr r0, [r4, #0x24]
 	mov r1, #0x10
@@ -5205,12 +5205,12 @@ _022148A0:
 	bne _022148EA
 	add r0, #0x5d
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #8]
 	ldr r0, [r4]
 	add r0, #0xc5
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #0xc]
 	ldr r0, [r4, #0x18]
 	add r1, r5, #0
@@ -5224,12 +5224,12 @@ _022148A0:
 _022148EA:
 	add r0, #0x29
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #8]
 	ldr r0, [r4]
 	add r0, #0x91
 	ldrb r0, [r0]
-	bl FUN_0206AE00
+	bl TrainerClass_GetGenderOrTrainerCount
 	str r0, [sp, #0xc]
 	ldr r0, [r4, #0x14]
 	add r1, r5, #0
diff --git a/arm9/modules/11/asm/module_11_thumb2.s b/arm9/modules/11/asm/module_11_thumb2.s
index a962fbf2..0c87c27f 100644
--- a/arm9/modules/11/asm/module_11_thumb2.s
+++ b/arm9/modules/11/asm/module_11_thumb2.s
@@ -4914,7 +4914,7 @@ _0223174C:
 	add r0, r4, #0
 	add r1, r7, #0
 	mov r3, #5
-	bl FUN_0206AD4C
+	bl GetTrainerMessageByIdPair
 	add r0, r6, #0
 	mov r1, #0xff
 	bl FUN_02019620
@@ -45181,7 +45181,7 @@ _022452F8:
 	ldr r0, [sp, #8]
 	mov r1, #0xd
 	mov r2, #5
-	bl FUN_0206ACD4
+	bl TrainerMessageWithIdPairExists
 	cmp r0, #0
 	beq _02245334
 	mov r1, #0x85
@@ -45219,7 +45219,7 @@ _0224533C:
 	ldr r0, [sp, #8]
 	mov r1, #0xe
 	mov r2, #5
-	bl FUN_0206ACD4
+	bl TrainerMessageWithIdPairExists
 	cmp r0, #0
 	beq _0224537C
 	ldr r1, _0224548C ; =0x00002E7D
@@ -45276,7 +45276,7 @@ _022453C6:
 	ldr r0, [sp, #8]
 	mov r1, #0xf
 	mov r2, #5
-	bl FUN_0206ACD4
+	bl TrainerMessageWithIdPairExists
 	cmp r0, #0
 	beq _022453F0
 	ldr r1, _0224548C ; =0x00002E7D
@@ -45340,7 +45340,7 @@ _0224543A:
 	ldr r0, [sp, #8]
 	mov r1, #0x10
 	mov r2, #5
-	bl FUN_0206ACD4
+	bl TrainerMessageWithIdPairExists
 	cmp r0, #0
 	beq _02245472
 	ldr r1, _0224548C ; =0x00002E7D
diff --git a/arm9/src/pokemon.c b/arm9/src/pokemon.c
index 48b1a225..7931ba51 100644
--- a/arm9/src/pokemon.c
+++ b/arm9/src/pokemon.c
@@ -3711,7 +3711,7 @@ int FUN_0206AA30(int x)
     case TRAINER_CLASS_PKMN_TRAINER_POKEKID:
         return x - TRAINER_CLASS_COMMANDER_JUPITER;
     default:
-        if (FUN_0206AE00(x) == 1)
+        if (TrainerClass_GetGenderOrTrainerCount(x) == 1)
             return 1;
         else
             return 0;
diff --git a/arm9/src/trainer_data.c b/arm9/src/trainer_data.c
new file mode 100644
index 00000000..7c52a78f
--- /dev/null
+++ b/arm9/src/trainer_data.c
@@ -0,0 +1,403 @@
+#include "global.h"
+#include "heap.h"
+#include "trainer_data.h"
+#include "math_util.h"
+#include "party.h"
+#include "proto.h"
+#include "msgdata.h"
+#include "constants/trainer_classes.h"
+
+#pragma thumb on
+
+extern void * FUN_02024EC0(struct SaveBlock2 *);
+extern u16 * FUN_02024EE8(void *);
+
+// Loads all battle opponents, including multi-battle partner if exists.
+void EnemyTrainerSet_Init(struct EnemyTrainerSet * enemies, struct SaveBlock2 * sav2, u32 heap_id)
+{
+    struct TrainerDataLoaded trdata;
+    struct MsgData * msgData;
+    u16 * rivalName;
+    s32 i;
+    struct String * str;
+
+    // FIXME: String formatting in files/msgdata/msg/narc_0559.txt is abnormal.
+    msgData = NewMsgDataFromNarc(1, NARC_MSGDATA_MSG, 559, heap_id);
+    rivalName = FUN_02024EE8(FUN_02024EC0(sav2));
+    for (i = 0; i < 4; i++)
+    {
+        if (enemies->trainer_idxs[i] != 0)
+        {
+            TrainerData_ReadTrData(enemies->trainer_idxs[i], &trdata.data);
+            enemies->datas[i] = trdata;
+            if (trdata.data.trainerClass == TRAINER_CLASS_PKMN_TRAINER_BARRY)
+            {
+                CopyU16StringArray(enemies->datas[i].name, rivalName);
+            }
+            else
+            {
+                str = NewString_ReadMsgData(msgData, enemies->trainer_idxs[i]);
+                CopyStringToU16Array(str, enemies->datas[i].name, OT_NAME_LENGTH + 1);
+                String_dtor(str);
+            }
+            CreateNPCTrainerParty(enemies, i, heap_id);
+        }
+    }
+    enemies->flags |= trdata.data.doubleBattle;
+    DestroyMsgData(msgData);
+}
+
+s32 TrainerData_GetAttr(u32 tr_idx, u32 attr_no)
+{
+    struct TrainerDataLoaded trainer;
+    s32 ret;
+
+    TrainerData_ReadTrData(tr_idx, &trainer.data);
+    switch (attr_no)
+    {
+    case 0:
+        ret = trainer.data.trainerType;
+        break;
+    case 1:
+        ret = trainer.data.trainerClass;
+        break;
+    case 2:
+        ret = trainer.data.unk_2;
+        break;
+    case 3:
+        ret = trainer.data.npoke;
+        break;
+    case 4:
+    case 5:
+    case 6:
+    case 7:
+        attr_no -= 4;
+        ret = trainer.data.items[attr_no];
+        break;
+    case 8:
+        ret = (s32)trainer.data.unk_C;
+        break;
+    case 9:
+        ret = (s32)trainer.data.doubleBattle;
+        break;
+    }
+    return ret; // UB: uninitialized in event of invalid attr
+}
+
+// Relevant files:
+//   files/poketool/trmsg/trtbl.narc
+//   files/poketool/trmsg/trtblofs.narc
+//   files/msgdata/msg/narc_0558.txt
+// trtbl is a single-member NARC whose entries are two shorts each. The first short
+// designates the trainer ID and the second the message ID. They are ordered the same
+// as the corresponding msgdata file. All messages for a given trainer are found together,
+// however the trainers are not in order in this file. trtblofs gives a pointer into trtbl
+// for each trainer. trtblofs is also a single-member NARC whose entries are shorts, one
+// per NPC trainer.
+BOOL TrainerMessageWithIdPairExists(u32 trainer_idx, u32 msg_id, u32 heap_id)
+{
+    u16 rdbuf[3];
+    struct NARC * trTblNarc;
+    BOOL ret = FALSE;
+    u32 trTblSize;
+
+    trTblSize = GetNarcMemberSizeByIdPair(NARC_POKETOOL_TRMSG_TRTBL, 0);
+    ReadFromNarcMemberByIdPair(&rdbuf[0], NARC_POKETOOL_TRMSG_TRTBLOFS, 0, trainer_idx * 2, 2);
+    trTblNarc = NARC_ctor(NARC_POKETOOL_TRMSG_TRTBL, heap_id);
+    while (rdbuf[0] != trTblSize)
+    {
+        NARC_ReadFromMember(trTblNarc, 0, rdbuf[0], 4, &rdbuf[1]);
+        if (rdbuf[1] == trainer_idx && rdbuf[2] == msg_id)
+        {
+            ret = TRUE;
+            break;
+        }
+        if (rdbuf[1] != trainer_idx)
+            break;
+        rdbuf[0] += 4;
+    }
+    NARC_dtor(trTblNarc);
+    return ret;
+}
+
+void GetTrainerMessageByIdPair(u32 trainer_idx, u32 msg_id, struct String * str, u32 heap_id)
+{
+    u16 rdbuf[3];
+    u32 trTblSize;
+    struct NARC * trTblNarc;
+
+    trTblSize = GetNarcMemberSizeByIdPair(NARC_POKETOOL_TRMSG_TRTBL, 0);
+    ReadFromNarcMemberByIdPair(&rdbuf[0], NARC_POKETOOL_TRMSG_TRTBLOFS, 0, trainer_idx * 2, 2);
+    trTblNarc = NARC_ctor(NARC_POKETOOL_TRMSG_TRTBL, heap_id);
+    while (rdbuf[0] != trTblSize)
+    {
+        NARC_ReadFromMember(trTblNarc, 0, rdbuf[0], 4, &rdbuf[1]);
+        if (rdbuf[1] == trainer_idx && rdbuf[2] == msg_id)
+        {
+            ReadMsgData_NewNarc_ExistingString(NARC_MSGDATA_MSG, 558, (u32)(rdbuf[0] / 4), heap_id, str);
+            break;
+        }
+        rdbuf[0] += 4;
+    }
+    NARC_dtor(trTblNarc);
+    if (rdbuf[0] == trTblSize)
+        StringSetEmpty(str);
+}
+
+void TrainerData_ReadTrData(u32 idx, struct TrainerData * dest)
+{
+    ReadWholeNarcMemberByIdPair(dest, NARC_POKETOOL_TRAINER_TRDATA, (s32)idx);
+}
+
+void TrainerData_ReadTrPoke(u32 idx, union TrainerMon * dest)
+{
+    ReadWholeNarcMemberByIdPair(dest, NARC_POKETOOL_TRAINER_TRPOKE, (s32)idx);
+}
+
+const u8 sTrainerClassGenderCountTbl[] = {
+    /*TRAINER_CLASS_PKMN_TRAINER_M*/             0,
+    /*TRAINER_CLASS_PKMN_TRAINER_F*/             1,
+    /*TRAINER_CLASS_YOUNGSTER*/                  0,
+    /*TRAINER_CLASS_LASS*/                       1,
+    /*TRAINER_CLASS_CAMPER*/                     0,
+    /*TRAINER_CLASS_PICNICKER*/                  1,
+    /*TRAINER_CLASS_BUG_CATCHER*/                0,
+    /*TRAINER_CLASS_AROMA_LADY*/                 1,
+    /*TRAINER_CLASS_TWINS*/                      1,
+    /*TRAINER_CLASS_HIKER*/                      0,
+    /*TRAINER_CLASS_BATTLE_GIRL*/                1,
+    /*TRAINER_CLASS_FISHERMAN*/                  0,
+    /*TRAINER_CLASS_CYCLIST_M*/                  0,
+    /*TRAINER_CLASS_CYCLIST_F*/                  1,
+    /*TRAINER_CLASS_BLACK_BELT*/                 0,
+    /*TRAINER_CLASS_ARTIST*/                     0,
+    /*TRAINER_CLASS_PKMN_BREEDER_M*/             0,
+    /*TRAINER_CLASS_PKMN_BREEDER_F*/             1,
+    /*TRAINER_CLASS_COWGIRL*/                    1,
+    /*TRAINER_CLASS_JOGGER*/                     0,
+    /*TRAINER_CLASS_POKEFAN_M*/                  0,
+    /*TRAINER_CLASS_POKEFAN_F*/                  1,
+    /*TRAINER_CLASS_POKE_KID*/                   1,
+    /*TRAINER_CLASS_YOUNG_COUPLE*/               2,
+    /*TRAINER_CLASS_ACE_TRAINER_M*/              0,
+    /*TRAINER_CLASS_ACE_TRAINER_F*/              1,
+    /*TRAINER_CLASS_WAITRESS*/                   1,
+    /*TRAINER_CLASS_VETERAN*/                    0,
+    /*TRAINER_CLASS_NINJA_BOY*/                  0,
+    /*TRAINER_CLASS_DRAGON_TAMER*/               0,
+    /*TRAINER_CLASS_BIRD_KEEPER*/                1,
+    /*TRAINER_CLASS_DOUBLE_TEAM*/                2,
+    /*TRAINER_CLASS_RICH_BOY*/                   0,
+    /*TRAINER_CLASS_LADY*/                       1,
+    /*TRAINER_CLASS_GENTLEMAN*/                  0,
+    /*TRAINER_CLASS_SOCIALITE*/                  1,
+    /*TRAINER_CLASS_BEAUTY*/                     1,
+    /*TRAINER_CLASS_COLLECTOR*/                  0,
+    /*TRAINER_CLASS_POLICEMAN*/                  0,
+    /*TRAINER_CLASS_PKMN_RANGER_M*/              0,
+    /*TRAINER_CLASS_PKMN_RANGER_F*/              1,
+    /*TRAINER_CLASS_SCIENTIST*/                  0,
+    /*TRAINER_CLASS_SWIMMER_M*/                  0,
+    /*TRAINER_CLASS_SWIMMER_F*/                  1,
+    /*TRAINER_CLASS_TUBER_M*/                    0,
+    /*TRAINER_CLASS_TUBER_F*/                    1,
+    /*TRAINER_CLASS_SAILOR*/                     0,
+    /*TRAINER_CLASS_SIS_AND_BRO*/                2,
+    /*TRAINER_CLASS_RUIN_MANIAC*/                0,
+    /*TRAINER_CLASS_PSYCHIC_M*/                  0,
+    /*TRAINER_CLASS_PSYCHIC_F*/                  1,
+    /*TRAINER_CLASS_PI*/                         0,
+    /*TRAINER_CLASS_GUITARIST*/                  0,
+    /*TRAINER_CLASS_ACE_TRAINER_SNOW_M*/         0,
+    /*TRAINER_CLASS_ACE_TRAINER_SNOW_F*/         1,
+    /*TRAINER_CLASS_SKIER_M*/                    0,
+    /*TRAINER_CLASS_SKIER_F*/                    1,
+    /*TRAINER_CLASS_ROUGHNECK*/                  0,
+    /*TRAINER_CLASS_CLOWN*/                      0,
+    /*TRAINER_CLASS_WORKER*/                     0,
+    /*TRAINER_CLASS_SCHOOL_KID_M*/               0,
+    /*TRAINER_CLASS_SCHOOL_KID_F*/               1,
+    /*TRAINER_CLASS_LEADER_ROARK*/               0,
+    /*TRAINER_CLASS_PKMN_TRAINER_BARRY*/         0,
+    /*TRAINER_CLASS_LEADER_BYRON*/               0,
+    /*TRAINER_CLASS_ELITE_FOUR_AARON*/           0,
+    /*TRAINER_CLASS_ELITE_FOUR_BERTHA*/          1,
+    /*TRAINER_CLASS_ELITE_FOUR_FLINT*/           0,
+    /*TRAINER_CLASS_ELITE_FOUR_LUCIEN*/          0,
+    /*TRAINER_CLASS_CHAMPION*/                   1,
+    /*TRAINER_CLASS_BELLE__PA*/                  2,
+    /*TRAINER_CLASS_RANCHER*/                    0,
+    /*TRAINER_CLASS_COMMANDER_MARS*/             1,
+    /*TRAINER_CLASS_GALACTIC*/                   0,
+    /*TRAINER_CLASS_LEADER_GARDENIA*/            1,
+    /*TRAINER_CLASS_LEADER_WAKE*/                0,
+    /*TRAINER_CLASS_LEADER_MAYLENE*/             1,
+    /*TRAINER_CLASS_LEADER_FANTINA*/             1,
+    /*TRAINER_CLASS_LEADER_CANDICE*/             1,
+    /*TRAINER_CLASS_LEADER_VOLKNER*/             0,
+    /*TRAINER_CLASS_PARASOL_LADY*/               1,
+    /*TRAINER_CLASS_WAITER*/                     0,
+    /*TRAINER_CLASS_INTERVIEWERS*/               2,
+    /*TRAINER_CLASS_CAMERAMAN*/                  0,
+    /*TRAINER_CLASS_REPORTER*/                   1,
+    /*TRAINER_CLASS_IDOL*/                       1,
+    /*TRAINER_CLASS_GALACTIC_BOSS*/              0,
+    /*TRAINER_CLASS_COMMANDER_JUPITER*/          1,
+    /*TRAINER_CLASS_COMMANDER_SATURN*/           1,
+    /*TRAINER_CLASS_GALACTIC_F*/                 1,
+    /*TRAINER_CLASS_PKMN_TRAINER_AROMA_LADY*/    1,
+    /*TRAINER_CLASS_PKMN_TRAINER_RICH_BOY*/      0,
+    /*TRAINER_CLASS_PKMN_TRAINER_PICNICKER*/     1,
+    /*TRAINER_CLASS_PKMN_TRAINER_CAMPER*/        0,
+    /*TRAINER_CLASS_PKMN_TRAINER_POKEKID*/       1,
+    /*TRAINER_CLASS_PKMN_TRAINER_LUCAS*/         0,
+    /*TRAINER_CLASS_PKMN_TRAINER_DAWN*/          1,
+    /*TRAINER_CLASS_TOWER_TYCOON*/               0
+};
+
+// Returns 0 for male, 1 for female, 2 for doubles. See above vector.
+int TrainerClass_GetGenderOrTrainerCount(int a0)
+{
+    return sTrainerClassGenderCountTbl[a0];
+}
+
+void CreateNPCTrainerParty(struct EnemyTrainerSet * enemies, s32 party_id, u32 heap_id)
+{
+    union TrainerMon * data;
+    s32 i;
+    s32 j;
+    u32 seed_bak;
+    struct Pokemon * pokemon;
+    struct TrainerMonSpeciesItemMoves * monSpeciesItemMoves;
+    struct TrainerMonSpeciesItem * monSpeciesItem;
+    struct TrainerMonSpeciesMoves * monSpeciesMoves;
+    struct TrainerMonSpecies * monSpecies;
+    u32 seed;
+    u32 personality;
+    u8 iv;
+    u32 pid_gender;
+
+    // We abuse the RNG for personality value generation, so back up the overworld
+    // state
+    seed_bak = GetLCRNGSeed();
+    InitPartyWithMaxSize(enemies->parties[party_id], PARTY_SIZE);
+    data = (union TrainerMon *)AllocFromHeap(heap_id, sizeof(union TrainerMon) * PARTY_SIZE);
+    pokemon = AllocMonZeroed(heap_id);
+    TrainerData_ReadTrPoke(enemies->trainer_idxs[party_id], data);
+
+    // If a Pokemon's gender ratio is 50/50, the generated Pokemon will be the same
+    // gender as its trainer. Otherwise, it will assume the more abundant gender
+    // according to its species gender ratio. In double battles, the behavior is
+    // identical to that of a solitary male opponent.
+    pid_gender = (u32)((TrainerClass_GetGenderOrTrainerCount(enemies->datas[party_id].data.trainerClass) == 1) ? 0x78 : 0x88);
+
+    // The trainer types can be more efficiently and expandibly treated as a flag
+    // array, with bit 0 being custom moveset and bit 1 being held item.
+    // Nintendo didn't do it that way, instead using a switch statement and a lot
+    // of code duplication. This has been the case since the 2nd generation games.
+    switch (enemies->datas[party_id].data.trainerType)
+    {
+    case TRTYPE_MON:
+    {
+        monSpecies = &data->species;
+        for (i = 0; i < enemies->datas[party_id].data.npoke; i++)
+        {
+            // Generate personality by seeding with a value based on the difficulty,
+            // level, species, and opponent ID. Roll the RNG N times, where N is
+            // the index of its trainer class. Finally, left shift the 16-bit
+            // pseudorandom value and add the gender selector.
+            // This guarantees that NPC trainers' Pokemon are generated in a
+            // consistent manner between attempts.
+            seed = monSpecies[i].difficulty + monSpecies[i].level + monSpecies[i].species + enemies->trainer_idxs[party_id];
+            SetLCRNGSeed(seed);
+            for (j = 0; j < enemies->datas[party_id].data.trainerClass; j++)
+            {
+                seed = LCRandom();
+            }
+            personality = (seed << 8);
+            personality += pid_gender;
+
+            // Difficulty is a number between 0 and 250 which directly corresponds
+            // to the (uniform) IV spread of the generated Pokemon.
+            iv = (u8)((monSpecies[i].difficulty * 31) / 255);
+            CreateMon(pokemon, monSpecies[i].species, monSpecies[i].level, iv, 1, (s32)personality, 2, 0);
+
+            // If you were treating the trainer type as a bitfield, you'd put the
+            // checks for held item and moves here. You'd also treat the trpoke
+            // data as a flat u16 array rather than an array of fixed-width structs.
+            AddMonToParty(enemies->parties[party_id], pokemon);
+        }
+        break;
+    }
+    case TRTYPE_MON_MOVES:
+    {
+        monSpeciesMoves = &data->species_moves;
+        for (i = 0; i < enemies->datas[party_id].data.npoke; i++)
+        {
+            seed = monSpeciesMoves[i].difficulty + monSpeciesMoves[i].level + monSpeciesMoves[i].species + enemies->trainer_idxs[party_id];
+            SetLCRNGSeed(seed);
+            for (j = 0; j < enemies->datas[party_id].data.trainerClass; j++)
+            {
+                seed = LCRandom();
+            }
+            personality = (seed << 8);
+            personality += pid_gender;
+            iv = (u8)((monSpeciesMoves[i].difficulty * 31) / 255);
+            CreateMon(pokemon, monSpeciesMoves[i].species, monSpeciesMoves[i].level, iv, 1, (s32)personality, 2, 0);
+            for (j = 0; j < 4; j++)
+            {
+                MonSetMoveInSlot(pokemon, monSpeciesMoves[i].moves[j], (u8)j);
+            }
+            AddMonToParty(enemies->parties[party_id], pokemon);
+        }
+        break;
+    }
+    case TRTYPE_MON_ITEM:
+    {
+        monSpeciesItem = &data->species_item;
+        for (i = 0; i < enemies->datas[party_id].data.npoke; i++)
+        {
+            seed = monSpeciesItem[i].difficulty + monSpeciesItem[i].level + monSpeciesItem[i].species + enemies->trainer_idxs[party_id];
+            SetLCRNGSeed(seed);
+            for (j = 0; j < enemies->datas[party_id].data.trainerClass; j++)
+            {
+                seed = LCRandom();
+            }
+            personality = (seed << 8);
+            personality += pid_gender;
+            iv = (u8)((monSpeciesItem[i].difficulty * 31) / 255);
+            CreateMon(pokemon, monSpeciesItem[i].species, monSpeciesItem[i].level, iv, 1, (s32)personality, 2, 0);
+            SetMonData(pokemon, MON_DATA_HELD_ITEM, &monSpeciesItem[i].item);
+            AddMonToParty(enemies->parties[party_id], pokemon);
+        }
+        break;
+    }
+    case TRTYPE_MON_ITEM_MOVES:
+    {
+        monSpeciesItemMoves = &data->species_item_moves;
+        for (i = 0; i < enemies->datas[party_id].data.npoke; i++)
+        {
+            seed = monSpeciesItemMoves[i].difficulty + monSpeciesItemMoves[i].level + monSpeciesItemMoves[i].species + enemies->trainer_idxs[party_id];
+            SetLCRNGSeed(seed);
+            for (j = 0; j < enemies->datas[party_id].data.trainerClass; j++)
+            {
+                seed = LCRandom();
+            }
+            personality = (seed << 8);
+            personality += pid_gender;
+            iv = (u8)((monSpeciesItemMoves[i].difficulty * 31) / 255);
+            CreateMon(pokemon, monSpeciesItemMoves[i].species, monSpeciesItemMoves[i].level, iv, 1, (s32)personality, 2, 0);
+            SetMonData(pokemon, MON_DATA_HELD_ITEM, &monSpeciesItemMoves[i].item);
+            for (j = 0; j < 4; j++)
+            {
+                MonSetMoveInSlot(pokemon, monSpeciesItemMoves[i].moves[j], (u8)j);
+            }
+            AddMonToParty(enemies->parties[party_id], pokemon);
+        }
+        break;
+    }
+    }
+    FreeToHeap(data);
+    FreeToHeap(pokemon);
+    SetLCRNGSeed(seed_bak);
+}