Mammomax AKA Maximus Jensen is a villain in the Marvel Universe and an enemy towards the X-Men.
Mammomax's past is unknown. He's an elephant-like mutant who was recruited into a new Brotherhood of Mutants that was led by Exodus. Mammomax first clashed with the X-Men when he was in Philadelphia.
Mammomax processes great physical strength, and endurance. He also has an incredible thick hide and razor sharp tusks. But the most unusual ability is that Mammomax can produce a powerful stomach acid which he can spit out of his mouth and use as a projectile attack.