Powers: Sumo has heightened strength, endurance, and resistance to physical injury. He has flexible flesh which can absorb impacts, temperature extremes and puncture wounds. He also has a mass-shifting ability which enables him to reposition his weight and form at will, enabling him to leap great distances.
Bio: Sumo was recruited by Stryfe to join the Mutant Liberation Front (MLF) with Dragoness and Kamikaze shortly after the team was created. The MLF fought the New Mutants several times.
On a mission to steal an ancient sword from a museum, Sumo and several other members of the MLF ran into Cable, who has been waiting to ambush them. Cable shot Sumo in the head, killing him.
The android Zero teleported the rest of the MLF to safety leaving Sumo's corpse behind.