Kroop is a friendly Koopa Troopa that first appears in the game Paper Mario: The Thousand-Year Door for the GameCube. In the game, you'll find him in the town of Petalburg in the pink house. Once you go in it, you'll see Kroop, who is the mayor of Petalburg. The Koopa Troopa is very old and has big thick white eye brows and a very wrinkled body. He explains that his hearing isn't very good, and always calls Mario Murphy. He is also very forgetful, sometimes even going on babbling and forgetting Mario is there. He even has information on the Crystal Stars.