Use space to select the button, Z to go back, and use arrow keys to scroll through the menus. Things new from the Master Belch fight is a better UI more visible pointer, animated enemy sprite for taking damage and when it dies, random critical hit chance, random damage system within a set range rather than static moves (basically like 50-75 based on offense stat) and a different PSI move. I've also added the ability to freely change the enemies stats, like Offense, Defense, Guts, and Speed. Enjoy!
Artwork and sprites from Nintendo. Stat system was borrowed and edited.