In his basic version, Rocky Botboa looks like a robot boxer with brown "shorts" and a brown "top". He has big red gloves and very small red shoes. His lower jaw looks is a yellow piece of scrap metal, contrasting with the primary paint on his body - color, remunicent of human skin. The jonts on his knees are visible, along with other robotic details. In later versions, he gains clothes.
- Attack: Cataclysmal
- Life: Tank
- Speed: Very Low
"This mutant is the best boxer that there ever was! No opponent was ever able to defeat him. Unfortunately, he was disqualified from competition because of a slight problem with... bolts. That really annoyed him."
- He is one of the slowest mutants in the game along with Tricera Tank and Hog the Ripper.
- His name is taken from Rocky Balboa the title character of the Rocky series.
- His Platinum version is based off Balrog from Street Fighter franchise.
- The design of this mutant is a reference to the film Real Steel.
- His Gold version is based off Apollo Creed from Rocky series.