An adorable, very kind Mogwai who is part of Billy Peltzer's life. Originally owned by Mr. Wing, Gizmo lives with Billy and Kate Peltzer in New York. Gizmo helps Billy defeat the gremlins each time they get loose.
The Abominable Snowmonster of the North, called Bumble for short, is the sole antagonist who roars loudly, but later reforms in the television special, Rudolph the Red-Nosed Reindeer. He is a gigantic white-furred yeti with long pointed fangs along with a hairless blue face, lips, hands and feet.