Spewpa is small, cocoon-like Pokémon mostly hidden by fluffy white fur with square particles of red, black, and pale yellow in and around the fur. Poking out of the top of its fur is its large, round head. The head is light gray in the back with a darker gray face. There is a beige dot over each eye and the face is bisected by a thin, black line that ends in a beige triangle at the top of the head. Its eyes are also beige with square, black pupils. In order to defend itself, Spewpa will bristle its fur to threaten predators or sprays powder.
Two Spewpa were used by the Lumiose Press editor-in-chief in Pangoro Poses a Problem, to stop X from protecting Alexa. With their Rage Powder, the Spewpa prevented X's Marisso and Salamè from listening to X's commands. Eventually, both were defeated, but X's Pokémon were left exhausted afterward.
Spewpa appears as a Poké Ball summon. It uses Stun Spore to temporarily stun any nearby opponents that attack it, but doesn't move otherwise.
NA: Spewpa, the Scatterdust Pokémon. This Bug-type Pokémon can harden its body to protect against attacks. If attacked in Smash Bros., it'll bristle up and paralyze its opponent with Stun Spore. However, it won't do anything if you don't attack it. Don't mess with it—it won't mess with you.
PAL: Spewpa, the Scatterdust Pokémon. This Bug-type Pokémon can harden its body to protect against attacks. In this game, it might bristle up and paralyse you with Stun Spore. "How ever can I avoid such a terrible fate?", you ask? Just leave it alone. Don't mess with Spewpa, and Spewpa won't mess with you.
Spewpa is the only Pokémon with a base stat total of 213.
Spewpa is likely based on the larval forms of certain members of the Tineidae family, such as the Carpet Moth and Case-bearing Clothes Moth, which construct snug cases of fibres and hairs that leave their heads exposed. Considering its evolutionary relatives, it may also represent a generic pupa of a moth or butterfly, particularly silkworm cocoons.