First Commit

Upload literally everything from the pokecrystal16 expand-move-ID branch

engine/battle/check_battle_scene.asm

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+CheckBattleScene:
+; Return carry if battle scene is turned off.
+
+	ld a, BANK(wLinkMode)
+	ld hl, wLinkMode
+	call GetFarWRAMByte
+	cp LINK_MOBILE
+	jr z, .mobile
+
+	ld a, [wOptions]
+	bit BATTLE_SCENE, a
+	jr nz, .off
+
+	and a
+	ret
+
+.mobile
+	ld a, [wcd2f]
+	and a
+	jr nz, .from_wram
+
+	ld a, BANK(s4_a60c) ; MBC30 bank used by JP Crystal; inaccessible by MBC3
+	call OpenSRAM
+	ld a, [s4_a60c]
+	ld c, a
+	call CloseSRAM
+
+	ld a, c
+	bit 0, c
+	jr z, .off
+
+	and a
+	ret
+
+.from_wram
+	ld a, BANK(w5_dc00)
+	ld hl, w5_dc00
+	call GetFarWRAMByte
+	bit 0, a
+	jr z, .off
+
+	and a
+	ret
+
+.off
+	scf
+	ret