Fishey Plague Ferdinand
Originally was a picture of Ferdinand Rudolph Hassler, but was attacked by fishes and given the fishy plague. He has a jagged red mouth with scary red eyes. He also has mysterious powers including exploding (as seen in Made in China) and shoddy toonification (as seen in The Plot against Mario Fandom). He fell in love with Peggy Hill in The Magic Fool Bucket, but she broke his heart.
The real Mr. Hassler started out as a professor of mathematics who helped the government survey land. He eventually became something of a mathematician.