Right arrow and left arrow to move. Z- confirm X- Back and In-Battle Heal C- Menu (some easter eggs on certain keys) This is the fight against Roleswap Sans. It took a while to get this early look at it together. more into the fight in notes and credits.
During the fight, you will have a partner, that you got in the core (since areas are inverted: Hotland > Waterfall > Snowdin > Ruins). You can interact with it and see its appearance. Sans attacks do okay damage, and with your partner healing 2 HP and each item healing 10, you'll be fine... I think? Bag contains your 5 monster candies and will heal 10 HP when you press X. Credits: (Unfinished) (Permission wasn't asked, sorry!) Basic Overworld: ErolTheDestroyer Kris sprites, Inventory menu, and Kris movement: Supershanio64 Waterfall Area: made with Sad_Bread_Official's undertale tileset maker All Partner Sprites: Askywalker on SpritersResource Original Sans overworld Sprite: TheLazyGuyy on DeviantArt Bone, Gaster Blaster, Platforms, Soul, Battle Box: Miyaoda Health Bars: Philloplol original Sans Battle Sprite: Mr-AAA-xd on deviantart