What needs to be added?
-A way to check if enemy's state is an overhead or a standing low attack.
-A way to check if the enemy's attack puts the target into a custom state.
-A way to reflect projectiles.
-A way to label helpers as projectiles.
-A way to change get hit sprites so that the characters will not revert back to their default sprites after they transform or somehow change appearance.
-Various debuffs like poison and specials lock. It is possible to code a poison effect now, but many other things require modifying other characters.
Arcade mode customization would also be nice.
I think it's possible to lock specials.
Adachi did nothing wrong. Still haven't beaten Cave Story's Hell. The Nutshack is a cute anime. Goanimate is my fav animu.