History of character is unknown.
- Transformation: Mammoth Mutt has the ability to inflate himself with air like a balloon.
- This version of Mammoth Mutt (Earth-One), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985-86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 1 Appearances of Mammoth Mutt (Earth-One)
- 1 Images featuring Mammoth Mutt (Earth-One)
- Quotations by or about Mammoth Mutt (Earth-One)
- Character Gallery: Mammoth Mutt (Earth-One)