Morton Koopa, Jr. was the 2nd boss in Super Mario Bros. 3, named after singer-actor Morton Downey, Jr., and I’m pretty sure that’s the guy who played Iron Man in all those Marvel Cinematic movies. Therefore, it’s probably fitting that his name in the DiC animated series, The Adventures of Super Mario Bros. 3, he was named “Big Mouth” Koopa.
I really love the Paul Stanley star over his eye.
(Yes, pedants, I know that Robert Downey, Jr. and Morton Downey, Jr. are not the same person.)