Crusher

Crusher is Rattles's pet dog. He is a tough looking dog who starts off as cruel and monstrous but has become more tame because of Killer and Nemo. He has appeared in "It Came From Beyond," "Pet Peeved" and many more episodes. He is a member of the Sock Exchange.

Arthur

 * 507b. "Pet Peeved"
 * 701b. "The Great Sock Mystery"
 * 906b. "It Came From Beyond"