pokecrystal-board/engine/events/pokerus/check_pokerus.asm

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CheckPokerus: ; 4d860
; Return carry if a monster in your party has Pokerus
; Get number of monsters to iterate over
ld a, [PartyCount]
and a
jr z, .NoPokerus
ld b, a
; Check each monster in the party for Pokerus
ld hl, PartyMon1PokerusStatus
ld de, PARTYMON_STRUCT_LENGTH
.Check:
ld a, [hl]
and $0f ; only the bottom nybble is used
jr nz, .HasPokerus
; Next PartyMon
add hl, de
dec b
jr nz, .Check
.NoPokerus:
and a
ret
.HasPokerus:
scf
ret