X-Tra is one of X-Z's aliens in ABC 10.
X-Tra looks like a black Wildmutt on his hind legs, but can talk. His knees bend down. He also has a white mustache.
X-Tra can shoot a beam from his mouth that clones anything rapidly. The cloning stops when X-Tra touches the original object. He can also summon a rolled-up newspaper in each hand and is quite agile.
X-Tra is very weak.