Trukk has blue skin, black and red eyes, and wears a gray outfit.
Trukk was first seen being released from solitary confinement after thirty days. He tried to beat up Ultimate Kevin to show him who is in charge. Instead, Ultimate Kevin beat him up, resulting in Trukk being sent to the emergency room.
Ben 10: Ultimate Alien
- ...Nor Iron Bars a Cage (first appearance)