In Clancy's one appearance in Clancy Strikes Back! Clancy returns in a shape-shifted form he tricks Grandpa Max into thinking is an excavating tool. After letting Max dig deep under the Rustbucket, he knocks out Grandpa Max, and absorbs some goggles that let you see a few minutes into the past. He later on fought Ben and the gang, but Ben won inevitably and very easily by scanning his DNA.
Ben 10: Alien Universe
- Clancy Strikes Back! (first re-appearance)
Back in Action: Alien Universe
- Why Am I Here? (first re-appearance)
- In Clancy Strikes Back! when Ben scans the DNA for Bugbite, Clancy is absorbed into the Omnitrix. This was indeed an error. Following the events of the episode, Clancy was put in a Plumber jailing facility in the Null Void.