Charlie Adler is the voice for Change Furlong, the Creeplings, one of the members of Katscratch's gang, and Zed on the show. He also voiced Mr. and Mrs. Bighead on Rocko's Modern Life, Cow, Red Guy, Chicken, Boneless Chicken and I.R. Baboon on Cow and Chicken and I.M. Weasel, Spike in the original My Little Pony, Ickis on Aahhh!!! Real Monsters, and many more.