Gremlin Jamface is a Gremlin that was supposed to be in Epic Mickey but was removed. He was to appear caged in the early stages of Dark Beauty Castle (at the beginning of the game) alongside Gus (who was originally supposed to be caged just like the other Gremlins) and another scrapped Gremlin named Barry. Either Jamface or Barry would lower a bridge that would make getting out of the area easy.
Epic Mickey 2: The Power of Two
"GREMLIN JAMFACE - Jamface is Gus' right hand man, and inventor of the projector network that links the lands of Wasteland together. When something needs fixing, Jamface is usually there getting his hands dirty." -Epic Mickey Facebook page description
Even though Jamface was removed from Epic Mickey, he appears in Epic Mickey 2: The Power of Two.