That or Big Bandit could also be a cyborg with replacement parts; notice that his only exposed portions are the metallic right arm and jaw, while everything else is wrapped. Also, of all the characters only Robot is the one whose mutations are considered "updates".Either way there's very little info so we can grant that any one of these scenarios is a possibility, and not even the creators of the game could agree on what is or is not canon. YMMV I guess. Pushing the argument any further will only delve into headcanon territory so it's best to leave this up to the individual's imagination.Also, thank you for commenting.