FusionDex

Curious by nature, Riomer sense their surroundings to try and find the auras of friendly people and Pokémon. If a Riomer detects someone with a violent aura, it will roll up and smack them until they go away.

While this Pokémon usually lives in the sea, it can survive on land, although not too long. The aura that emanates from its body intensifies to alert others if it is afraid or sad.