The WaQuadgun is a far from perfect Wa-guy clone of the Quadgun. It was made by WaDucky to combat the Quadgun that Ducky has created. It was a total failure, with the only good thing being that it has sentience.
It's weapons turn out to be fake and it is a organic being, not a tank. It can only attack by rolling over people and all of it's eyes are weak, but it tries to disguise itself as the Quadgun to run somebody over, you can reveal it's secret by touching it's teeth so it won't be so effective.