Fighting with Gaster: Welcome to the void! 2 Player Mode! P1 (Gaster): Z- Fire bones; N for Blue Bones, M for Orange Bones X- Summon Gaster Blasters; 1 for changing Blaster size IJKL- Move Gaster G- Wingdings H- Blacks out everything for one second WASD- Move soul to edges 5+6: Send Hand Attacks; 7,8 to make them bigger (can't use big hands again for a bit) 9: Summon Papyrus and Sans (Not added to Gaster's HP or will receive attacks) Space: Turn soul blue+red P2(The Human): Up, Down, Left, Right: Move soul F: Fight while hovering over Fight button Good luck!
Sans18 was my inspiration.