Sync further with pokegold

constants/battle_anim_constants.asm

@@ -818,7 +818,7 @@ DEF NUM_BATTLE_BG_EFFECTS EQU const_value - 1
 	const BATTLE_ANIM_GFX_WAVE       ; 26
 	const BATTLE_ANIM_GFX_AEROBLAST  ; 27
 	const BATTLE_ANIM_GFX_PLAYERHEAD ; 28
-	const BATTLE_ANIM_GFX_ENEMYFEET   ; 29
+	const BATTLE_ANIM_GFX_ENEMYFEET  ; 29
 DEF NUM_BATTLE_ANIM_GFX EQU const_value - 1
 
 ; battle_bg_effect struct members (see macros/ram.asm)

engine/events/treemons.asm

@@ -100,6 +100,7 @@ GetTreeMons:
 	cp NUM_TREEMON_SETS
 	jr nc, .quit
 
+	assert TREEMON_SET_CITY == 0
 	and a
 	jr z, .quit
 

macros/scripts/pic_anims.asm

@@ -11,6 +11,7 @@ ENDM
 	const_def -1, -1
 
 	const endanim_command ; $ff
+	assert endanim_command == oamend_command ; LEGACY: Support for the old name of "oamend"
 MACRO endanim
 	db endanim_command
 ENDM