Bowser's Castle Shop is a location that appears in Paper Mario. It is an Item Shop run by a Spiked Goomba in Bowser's Castle. This is also the very last Item Shop visited in the game and it mainly sells items from the past areas but at higher prices. The Spiked Goomba only sells items to Mario because he doesn't recognize Mario (though, even though he thought it was Mario, he was going to sell items to him anyway).