Here is my challenge, as soon as you are able to get Mog, Gau, Umaro and Gogo, you get them and beat Keffka's tower with no control over your characters. This means Mog is always Dance, Gau is always rage, Umaro...is Umaro and Gogo is also always Dance/Rage...your choice.
Extra Bonus: If GBA, beat the extra dungeon like this too