add pokerus check

1 files changed, 30 insertions, 1 deletions

diff --git a/main.asm b/main.asm
index dfa6cf80c..2c1cdd3ab 100644
--- a/main.asm
+++ b/main.asm
@@ -18653,7 +18653,36 @@ TileTypeTable: ; 4ce1f
 	db $00, $00, $00, $00, $00, $00, $00, $0f
 ; 4cf1f
 
-INCBIN "baserom.gbc",$4cf1f,$50000 - $4cf1f
+INCBIN "baserom.gbc",$4cf1f,$4d860 - $4cf1f
+
+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, PartyMon2 - PartyMon1
+.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
+; 4d87a
+
+INCBIN "baserom.gbc",$4d87a,$50000 - $4d87a
 
 SECTION "bank14",DATA,BANK[$14]