2017-12-15 17:10:54 -08:00
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ApplyPokerusTick: ; 13988
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; decreases all pokemon's pokerus counter by b. if the lower nybble reaches zero, the pokerus is cured.
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2018-01-23 14:39:09 -08:00
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ld hl, wPartyMon1PokerusStatus ; wPartyMon1 + MON_PKRS
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ld a, [wPartyCount]
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2017-12-15 17:10:54 -08:00
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and a
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ret z ; make sure it's not wasting time on an empty party
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ld c, a
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.loop
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ld a, [hl]
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and $f ; lower nybble is the number of days remaining
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jr z, .next ; if already 0, skip
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sub b ; subtract the number of days
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jr nc, .ok ; max(result, 0)
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xor a
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.ok
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ld d, a ; back up this value because we need to preserve the strain (upper nybble)
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ld a, [hl]
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and $f0
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add d
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ld [hl], a ; this prevents a cured pokemon from recontracting pokerus
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.next
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ld de, PARTYMON_STRUCT_LENGTH
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add hl, de
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dec c
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jr nz, .loop
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ret
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