Call Back: The Mads' Disco Bubble Cummerbund is the exact same as Joel's Bubble Cummerbund from back in Robot Monster. Joel doesn't protest this time around about their stealing one of his inventions, though he does note that it seems rather familiar.
(Servo chuckles as Joel casually rips off Crow's arm again)
Crow: Sorry, SORRY!
(Joel tosses the arm away)
Servo: That's what you get.
I Know Kung-Fu: Joel and the bots assume this about the Japanese people and act disappointed when the fight between Keisuke and Onodera is just a regular brawl.
Motor Mouth: Tom in the first break from the movie provides an advertisement for a Gamera toy set and its disclaimer at a speed John Moschitta would be impressed with. The problem, though, is that poor Tom goes so fast he can't stop himself and is reduced to babbling 'Mommy! Mmmommy!'.
Early Installment Weirdness: In addition to all of the other weirdness of the KTMA season, this particular episode sees Servo enter the theater on his own power, instead of having Joel carry him.
It's Pronounced Tro-PAY: Joel consistently mispronounces "Gamera" as "Gameron". You have to wonder how he managed to get that wrong, since the monster is referred to by his correct name throughout the movie and it's spelled properly on the title card.
Sequel First: invoked This, the second Gamera movie, was the first one to be riffed by Joel n' the bots.