What is your favorite silly monster from any retro media?
This is a cheat answer, but I’d like to say every single monster in the Shaw Brothers’ Infra-Man (1975). This Hong Kong superhero/kung fu movie is an absolute gem. It’s wildly imaginative and a delight to watch.
The dialogue is amazing, too, with lines like “Gentlemen, the situation is so bad, it’s the worst in human history,” and “For success, it’s essential you have Thunderball Fists.”