They use the paint-like substance on their tails to mark their territory. They are considered pests as they will paint over brand new buildings.
Ratsy is a small, bipedal rodent Pokémon. It is covered in short, dark-gray fur, with a light-gray stomach and black bands around its neck, wrists, and ankles. It has a tuft of pink hair on its head. Its long, hairless tail is tipped in something resembling a paintbrush, which drips with yellow paint.
Ratsy leak a brightly-colored, paint-like substance from their tails. They use these to mark their territory, defacing buildings, statues, and public property in the process.
Ratsy are timid, sneaky Pokémon that will run and hide at the first sight of an enemy.