It uses the paint-like fluid from its tail to decorate its disguises. Smearkyu usually dresses like a Smeargle, but it sometimes creates alternate costumes to fit different situations.
Smearkyu are able to replicate any art perfectly. Such a unique ability has created a financial crisis within the fine art market. These Pokémon have exhibited a fixation with Pokédollars, however, and won't work without appropriate compensation.