Jaedan Psypig is named Jaedan as a Heavyweight character, Grumpig is named Jaedan Psypig as the Male-only character and no female counterpart.
Grumpig is a bipedal, pig-like Pokémon. It has large ears, a pink snout, and oval eyes. The lower half of its body is black, while the upper half is purple. There are black markings on its ears and arms, while its hands and feet are purple. Its tail is pink and curly. There appear to be three shining black pearls on its body: two on its head, and another on its midsection where the black meets the purple. These pearls are used to amplify its psychic powers, which allow it to control its opponents. The dance it performs while using its powers is very popular. It lives on mountains.