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HiddenPowerDamage:
; Override Hidden Power's type and power based on the user's DVs.
ld hl, wBattleMonDVs
ldh a, [hBattleTurn]
and a
jr z, .got_dvs
ld hl, wEnemyMonDVs
.got_dvs
; Power:
; Take the top bit from each stat
; Attack
ld a, [hl]
swap a
and %1000
; Defense
ld b, a
ld a, [hli]
and %1000
srl a
or b
; Speed
ld b, a
ld a, [hl]
swap a
and %1000
srl a
srl a
or b
; Special
ld b, a
ld a, [hl]
and %1000
srl a
srl a
srl a
or b
; Multiply by 5
ld b, a
add a
add a
add b
; Add Special & 3
ld b, a
ld a, [hld]
and %0011
add b
; Divide by 2 and add 30 + 1
srl a
add 30
inc a
ld d, a
; Type:
; Def & 3
ld a, [hl]
and %0011
ld b, a
; + (Atk & 3) << 2
ld a, [hl]
and %0011 << 4
swap a
add a
add a
or b
; Skip Normal
inc a
; Skip Bird
cp BIRD
jr c, .done
inc a
; Skip unused types
cp UNUSED_TYPES
jr c, .done
add UNUSED_TYPES_END - UNUSED_TYPES
.done
; Overwrite the current move type.
push af
ld a, BATTLE_VARS_MOVE_TYPE
call GetBattleVarAddr
pop af
ld [hl], a
; Get the rest of the damage formula variables
; based on the new type, but keep base power.
ld a, d
push af
farcall BattleCommand_DamageStats ; damagestats
pop af
ld d, a
ret
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