Munna is a Psychic-type Pokémon that is a a pink, nearly spherical, quadruped Pokémon of indefinable basis. Its four tiny limbs are tapered, as is its downwardly curving snout which largely obscures its sizable mouth. It has vertically oval, shiny, red eyes with two discernible upper eyelashes. Between its eyes is a vertically oval spot in a darker shade of pink, from which Munna can expel a material called Dream Mist. This darker shade of pink is also the color of the center of the five purple petal flowers ornamenting much of Munna's body.
- Munna is very similar to Dusknoir from Pokemon Mystery Dungeon: Explorers of Time/Darkness/Sky, both appear benevolent towards everyone including the player and partner Pokemon, both appear friendly but are actually evil Pokemon, both actually serve an evil supreme being (Dusknoir works for Primal Dialga, and Munna works for Bittercold), both tricked the main characters into believing another threatening-looking Pokémon was the true villain (Dusknoir:Grovyle, Munna:Hydreigon) & both are redeemed after the game's post story.