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.
Celebrity Resemblance: Joel goes insane and starts listing about a dozen of these. Gamera's resemblance to Karl Malden (especially his nose) is a Running Gag throughout all the Gamera episodes.
Computer Wars: Discussed in the opening segment by Tom (who prefers Macs) and Crow (who prefers PCs) while Tom tries to work on a file on Crow's computer. Servo complains about using MS-DOS and its text-only, programmer-driven interface. Crow mocks the user-friendly interface of the Mac, asking if Tom wants fairy creatures to do everything on screen for him, then pushes his button on the oft-delayed System 7note Released in mid-1991, it wasn't perfected til 1997.
Joel (who concludes that both interfaces are fine, it's just a matter of personal preference) stirs things up by mentioning the Amiga.
Doorstopper: The Stand, specifically the "new uncut" edition that Frank picked up for Dr. Forrester's trip to the beach. It's thicker than Frank's head, and causes Dr. F to fall over when Frank gives it to him.
(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.