1 files changed, 164 insertions, 0 deletions
diff --git a/engine/battle/read_trainer_party.asm b/engine/battle/read_trainer_party.asm
new file mode 100644
index 00000000..f1e3aaf1
--- /dev/null
+++ b/engine/battle/read_trainer_party.asm
@@ -0,0 +1,164 @@
+ReadTrainer: ; 39c53 (e:5c53)
+
+; don't change any moves in a link battle
+	ld a,[wLinkState]
+	and a
+	ret nz
+
+; set [wEnemyPartyCount] to 0, [wEnemyPartyMons] to FF
+; XXX first is total enemy pokemon?
+; XXX second is species of first pokemon?
+	ld hl,wEnemyPartyCount
+	xor a
+	ld [hli],a
+	dec a
+	ld [hl],a
+
+; get the pointer to trainer data for this class
+	ld a,[W_CUROPPONENT]
+	sub $C9 ; convert value from pokemon to trainer
+	add a,a
+	ld hl,TrainerDataPointers
+	ld c,a
+	ld b,0
+	add hl,bc ; hl points to trainer class
+	ld a,[hli]
+	ld h,[hl]
+	ld l,a
+	ld a,[W_TRAINERNO]
+	ld b,a
+; At this point b contains the trainer number,
+; and hl points to the trainer class.
+; Our next task is to iterate through the trainers,
+; decrementing b each time, until we get to the right one.
+.outer
+	dec b
+	jr z,.IterateTrainer
+.inner
+	ld a,[hli]
+	and a
+	jr nz,.inner
+	jr .outer
+
+; if the first byte of trainer data is FF,
+; - each pokemon has a specific level
+;      (as opposed to the whole team being of the same level)
+; - if [W_LONEATTACKNO] != 0, one pokemon on the team has a special move
+; else the first byte is the level of every pokemon on the team
+.IterateTrainer
+	ld a,[hli]
+	cp $FF ; is the trainer special?
+	jr z,.SpecialTrainer ; if so, check for special moves
+	ld [W_CURENEMYLVL],a
+.LoopTrainerData
+	ld a,[hli]
+	and a ; have we reached the end of the trainer data?
+	jr z,.FinishUp
+	ld [wcf91],a ; write species somewhere (XXX why?)
+	ld a,1
+	ld [wcc49],a
+	push hl
+	call AddPartyMon
+	pop hl
+	jr .LoopTrainerData
+.SpecialTrainer
+; if this code is being run:
+; - each pokemon has a specific level
+;      (as opposed to the whole team being of the same level)
+; - if [W_LONEATTACKNO] != 0, one pokemon on the team has a special move
+	ld a,[hli]
+	and a ; have we reached the end of the trainer data?
+	jr z,.AddLoneMove
+	ld [W_CURENEMYLVL],a
+	ld a,[hli]
+	ld [wcf91],a
+	ld a,1
+	ld [wcc49],a
+	push hl
+	call AddPartyMon
+	pop hl
+	jr .SpecialTrainer
+.AddLoneMove
+; does the trainer have a single monster with a different move
+	ld a,[W_LONEATTACKNO] ; Brock is 01, Misty is 02, Erika is 04, etc
+	and a
+	jr z,.AddTeamMove
+	dec a
+	add a,a
+	ld c,a
+	ld b,0
+	ld hl,LoneMoves
+	add hl,bc
+	ld a,[hli]
+	ld d,[hl]
+	ld hl,wEnemyMon1Moves + 2
+	ld bc,wEnemyMon2 - wEnemyMon1
+	call AddNTimes
+	ld [hl],d
+	jr .FinishUp
+.AddTeamMove
+; check if our trainer's team has special moves
+
+; get trainer class number
+	ld a,[W_CUROPPONENT]
+	sub $C8
+	ld b,a
+	ld hl,TeamMoves
+
+; iterate through entries in TeamMoves, checking each for our trainer class
+.IterateTeamMoves
+	ld a,[hli]
+	cp b
+	jr z,.GiveTeamMoves ; is there a match?
+	inc hl ; if not, go to the next entry
+	inc a
+	jr nz,.IterateTeamMoves
+
+; no matches found. is this trainer champion rival?
+	ld a,b
+	cp SONY3
+	jr z,.ChampionRival
+	jr .FinishUp ; nope
+.GiveTeamMoves
+	ld a,[hl]
+	ld [wEnemyMon5Moves + 2],a
+	jr .FinishUp
+.ChampionRival ; give moves to his team
+
+; pidgeot
+	ld a,SKY_ATTACK
+	ld [wEnemyMon1Moves + 2],a
+
+; starter
+	ld a,[W_RIVALSTARTER]
+	cp STARTER3
+	ld b,MEGA_DRAIN
+	jr z,.GiveStarterMove
+	cp STARTER1
+	ld b,FIRE_BLAST
+	jr z,.GiveStarterMove
+	ld b,BLIZZARD ; must be squirtle
+.GiveStarterMove
+	ld a,b
+	ld [wEnemyMon6Moves + 2],a
+.FinishUp ; XXX this needs documenting
+	xor a       ; clear D079-D07B
+	ld de,wd079
+	ld [de],a
+	inc de
+	ld [de],a
+	inc de
+	ld [de],a
+	ld a,[W_CURENEMYLVL]
+	ld b,a
+.LastLoop
+	ld hl,wd047
+	ld c,2
+	push bc
+	predef AddBCDPredef
+	pop bc
+	inc de
+	inc de
+	dec b
+	jr nz,.LastLoop
+	ret
+\ No newline at end of file