First off I want qualify that I was not the adult man in a diaper.
Secondly, I feel like there needed to be more discussion of Lola Bunny who launched a thousand furry fetishes; in a kids' movie no less.
Thirdly as a Chicagoan(suburbs count fight me) I feel like this episode totally counteracted the good will from taking down our collective cinematic villain (Blues Brothers 2000). The soundtrack was great, kids loved it, it's already a movie where cartoon characters exist in parallel to normal reality so why are you looking for plot holes in the sci-aspects?
PS. Why no discussion of Wayne Knight's hero's journey? He follows Michael into Tune World when no one else will. He steps into the game against the Monstars knowing that they will annihilate him. He should be the protagonist of the movie.