Phil

From Wikitrix

During Max's time with the Plumbers, Phil was his partner. Together, the two managed to prevent Vilgax from stealing nuclear missiles, resulting in the destruction of Vilgax's ship. After that point, the work dried up and the Plumbers were disbanded. Though Max retired, Phil continued the work, capturing aliens and charging various people for the captures.

During an incident with a small alien, he met up with Max again, and tried to get him to reform the Plumbers. After Max refused, he ended up calling for help to deal with some more loose aliens. He discovers that Ben has the Omnitrix during this second fight, and pushes even harder to reform the Plumbers. Through his constant insistence and the familiar aliens they'd been fighting, Max discovers that Phil had been using the Null Void Projector — a weapon capable of opening a portal to an alternate dimension, which was used as an alien prison — to con people into paying him to remove the aliens. After Max discovers his secret, Phil tries to get rid of him twice, but is stopped by Ben as XLR8 and Grey Matter. In the end, Phil ends up trapped in the Null Void. When Gwen asks what would happen to him, Grandpa replies, "There are some things about this job we're better off not knowing".