Boxer

Boxer is one of the group of robots known as the Glitches. Boxer was a robot built that was built in somebody's garage as meant to be a sparring robot for a local gym, but was discarded when it was found out that Boxer ended up breaking some of the human sparring partner's bones with a single punch. Boxer was actually kicked out of the town he was built in and soon joined up with Jerry and Thumper and went off to eventually encounter Rufus.