Yipper is a Chihuahua and one of The Bullies.
- Marshall and the Cowardly Pup Princess (Part 1 only)
- Pups Spook Out
- Pup-Tails (Part 2)
- Pups and the great discovery
Yipper is the smallest of the bullies. Even though the bullies always get what they deserved, they still always bully the pups. He prefers to bully both Rocky and Zuma.
Yipper doesn't bark, he yips, which is why his name is Yipper. He also tends to talk slick and take advantage of other pups. He likes to swim, but he hates laughter from pups, especially Zuma's laugh.
Yipper is a creamish colored Chihuahua with a ear ring in one of his ears.