Sorry SE, but endgame won't work if you don't fix something.

[Astarica]

don't see how SE, Yoshi in particular can call a scripted boss fight Hard mode in the first place.

the one thing this game lacks in spades is a real AI with possibilities instead of scripted actions..

Games are scripted because you'd have to be a moron to lose to 8 guys if you get to control a boss, so any boss that's beatable at all clearly isn't very smart. Even if you're forced to obey aggro list for targetting/positioning (otherwise turn around and Mountain Buster, instant game over), if you can simply say use all your moves at the same time you would still almost certainly never lose as the boss.