Alright, I will shut down the Beetleworx generator for you.
–Gremlin Delta, Epic Mickey
Gremlin Delta is a blueGremlin that can be found in the Space Voyage area of Tomorrow City.
To free him, Mickey must thin the small pod to go to a TV power plate, power it up with a TV and it will activate a crane (the same one needed for Gremlin Omega) and jump into the door. Once he has been freed from his cage, he can either shut down the BeetleworxTanker Generator/Replicator or give you three TV Sketches.