The Zimmer Twins
13 (voiced by Daniel Davies (2006-2008)) – 13 is the twin's cat, with lime green eyes and a straight-line mouth. He can talk. He does not like baths, and is very fond of fish. 13 can do many things humans can do, such as playing the guitar or holding objects with his hands. He has an alter ego, Captain Furball. Sometimes, he seems to not like Eva.