Rex Rigid
Liquid Man / Mr. Waterballoon, Megaton Man Universe
- Also known as Professor Rex Rigid,Professor Rigid
Appearances
- Megaton Man #1 — 1984-11-10
- Megaton Man #2 — 1985-02-00
- The Return of Megaton Man #3 — 1988-09-10
- Megaton Man #1 — 1989-00-00
- Megaton Man Meets The Uncategorizable X+Thems #1 — 1989-04-00
- Savage Dragon vs. Savage Megaton Man #1 — 1993-03-00
- Don Simpson's Bizarre Heroes #1 — 1994-05-10
- Bizarre Heroes: The Apocalypse Affiliation #1 — 1995-04-00
- Bizarre Heroes #11 — 1995-05-00
- X-Amount of Comics: 1963 (WhenElse?!) Annual #[nn] — 2023-08-00