Mervis is CatDog's best friend and CatDog's secondary tritagonist. He is usually found in Dunlap. They appeared together at CatDog's house for a party, and Cat threw a "Party Animal". He is also another close friend of CatDog. Marvis works as a paperboy in the "Fistful of Mail". He is a Kavity Krunch Cereal Factory box licker with Dunglap and CatDog. He and Dunlap are friends, but they are often seen fighting each other.