Someone needs to compile a list of references in this episode.
There was Hulk, E.T, X-men (that robot was obviously Sentinel), Gunbuster's training montage and probably Rocky too, The Fly (lol), Twilight Zone and the list goes ooooooon.
There was also a Slimer (Ghostbusters) look-a-like when the ball room was shown the first time.
Let's also mention the entire genre of high school movies (especially from the 80's).