Simon Walterson

Once a human man, Simon Walterson was transformed into a frog by a witch as punishment. Though trapped in an amphibian body and unable to speak with humans, he retained his full human intellect and memories — and eventually crossed paths with Thor, earning the nickname Puddlegulp.

There's a quietly poignant corner of Marvel's Thor mythology that belongs to Simon Walterson, a character who first hopped onto the page in Thor #364 (1986), conjured by the legendary Walter Simonson during one of the most celebrated runs in the Thunder God's history. Across nearly four decades of Marvel storytelling, Simon has kept remarkable company — sharing adventures with Thor Odinson, the teleporting Lockjaw, and even the amphibious avenger Throg — which tells you something about the wonderfully offbeat niche this character occupies. With appearances spanning titles like Lockjaw & the Pet Avengers: Unleashed alongside his Thor roots, Simon Walterson is a Copper Age curiosity with genuine longevity, and that one collector-recognized key issue is reason enough to keep an eye out for his appearances on the shelf.