Knight Gremlin spawned at Clamp Center in 1990. It wears a plastic toy version of a knights' armor suit along with a toy fencing sword.
He was one of the many gremlins spawned by either Lenny, Daffy and George. Later he was present in the Clamp Center's main lobby where he was singing to the Brain Gremlin's rendition of the "New York New York" song with the rest of the other gremlins near the end of the story. Murray Futterman sprayed water on him and the rest of the Gremlin horde and they started to spawn new Gremlins, then Billy Peltzer quickly unleashed the Electric Gremlin on him and most of the gremlins (except Greta) and they're mostly quickly electrocuted to death.