Pokemon Cards Art on Canvas: How This Piece Transformed My Living Room and Became the Centerpiece Painting over pokemon trading cards with gouache Squirtle Painting Process , Always thrilled to paint a sowsow card! Been wanting to do this one for a long time. Look at how much fun he's having. , ., I painted this on Squirtle card from World's Smallest Uno: A fully playable mini deck of the beloved card game.