diff --git a/main.asm b/main.asm
index 263d00406..994d60ea0 100644
--- a/main.asm
+++ b/main.asm
@@ -3289,7 +3289,130 @@ INCBIN "baserom.gbc",$30000,$34000 - $30000
 
 SECTION "bankD",DATA,BANK[$D]
 
-INCBIN "baserom.gbc",$34000,$38000 - $34000
+INCBIN "baserom.gbc",$34000,$34BB1 - $34000
+
+TypeEffects: ; 0x34BB1
+; format: attacking type, defending type, damage multiplier
+; multiplier is a (decimal) fixed-point number
+;	$14 is *2.0
+;	$05 is *0.5
+;	$00 is *0
+
+	db NORMAL,ROCK,$05
+	db NORMAL,STEEL,$05
+	db FIRE,FIRE,$05
+	db FIRE,WATER,$05
+	db FIRE,GRASS,$14
+	db FIRE,ICE,$14
+	db FIRE,BUG,$14
+	db FIRE,ROCK,$05
+	db FIRE,DRAGON,$05
+	db FIRE,STEEL,$14
+	db WATER,FIRE,$14
+	db WATER,WATER,$05
+	db WATER,GRASS,$05
+	db WATER,GROUND,$14
+	db WATER,ROCK,$14
+	db WATER,DRAGON,$05
+	db ELECTRIC,WATER,$14
+	db ELECTRIC,ELECTRIC,$05
+	db ELECTRIC,GRASS,$05
+	db ELECTRIC,GROUND,$00
+	db ELECTRIC,FLYING,$14
+	db ELECTRIC,DRAGON,$05
+	db GRASS,FIRE,$05
+	db GRASS,WATER,$14
+	db GRASS,GRASS,$05
+	db GRASS,POISON,$05
+	db GRASS,GROUND,$14
+	db GRASS,FLYING,$05
+	db GRASS,BUG,$05
+	db GRASS,ROCK,$14
+	db GRASS,DRAGON,$05
+	db GRASS,STEEL,$05
+	db ICE,WATER,$05
+	db ICE,GRASS,$14
+	db ICE,ICE,$05
+	db ICE,GROUND,$14
+	db ICE,FLYING,$14
+	db ICE,DRAGON,$14
+	db ICE,STEEL,$05
+	db ICE,FIRE,$05
+	db FIGHTING,NORMAL,$14
+	db FIGHTING,ICE,$14
+	db FIGHTING,POISON,$05
+	db FIGHTING,FLYING,$05
+	db FIGHTING,PSYCHIC,$05
+	db FIGHTING,BUG,$05
+	db FIGHTING,ROCK,$14
+	db FIGHTING,DARK,$14
+	db FIGHTING,STEEL,$14
+	db POISON,GRASS,$14
+	db POISON,POISON,$05
+	db POISON,GROUND,$05
+	db POISON,ROCK,$05
+	db POISON,GHOST,$05
+	db POISON,STEEL,$00
+	db GROUND,FIRE,$14
+	db GROUND,ELECTRIC,$14
+	db GROUND,GRASS,$05
+	db GROUND,POISON,$14
+	db GROUND,FLYING,$00
+	db GROUND,BUG,$05
+	db GROUND,ROCK,$14
+	db GROUND,STEEL,$14
+	db FLYING,ELECTRIC,$05
+	db FLYING,GRASS,$14
+	db FLYING,FIGHTING,$14
+	db FLYING,BUG,$14
+	db FLYING,ROCK,$05
+	db FLYING,STEEL,$05
+	db PSYCHIC,FIGHTING,$14
+	db PSYCHIC,POISON,$14
+	db PSYCHIC,PSYCHIC,$05
+	db PSYCHIC,DARK,$00
+	db PSYCHIC,STEEL,$05
+	db BUG,FIRE,$05
+	db BUG,GRASS,$14
+	db BUG,FIGHTING,$05
+	db BUG,POISON,$05
+	db BUG,FLYING,$05
+	db BUG,PSYCHIC,$14
+	db BUG,GHOST,$05
+	db BUG,DARK,$14
+	db BUG,STEEL,$05
+	db ROCK,FIRE,$14
+	db ROCK,ICE,$14
+	db ROCK,FIGHTING,$05
+	db ROCK,GROUND,$05
+	db ROCK,FLYING,$14
+	db ROCK,BUG,$14
+	db ROCK,STEEL,$05
+	db GHOST,NORMAL,$00
+	db GHOST,PSYCHIC,$14
+	db GHOST,DARK,$05
+	db GHOST,STEEL,$05
+	db GHOST,GHOST,$14
+	db DRAGON,DRAGON,$14
+	db DRAGON,STEEL,$05
+	db DARK,FIGHTING,$05
+	db DARK,PSYCHIC,$14
+	db DARK,GHOST,$14
+	db DARK,DARK,$05
+	db DARK,STEEL,$05
+	db STEEL,FIRE,$05
+	db STEEL,WATER,$05
+	db STEEL,ELECTRIC,$05
+	db STEEL,ICE,$14
+	db STEEL,ROCK,$14
+	db STEEL,STEEL,$05
+	db $FE ; foresight
+	db NORMAL,GHOST,$00
+	db FIGHTING,GHOST,$00
+	db $FF ; end
+	; 0x34CFD
+
+INCBIN "baserom.gbc",$34CFD,$38000 - $34CFD
 
 SECTION "bankE",DATA,BANK[$E]