The Boo Bell is an item that appears in Mario Party 2 and Mario Party 3. The Boo Bell appears as a purple bell with a lavender handle. When a character uses the Boo Bell, Boo can be summoned at anytime during their turn. Boo will then steal coins or stars from another character when summoned. However, the character must pay the fee for stealing coins or stars. While the Boo Bell does not appear in later Mario Party games, there are different items that are similar to the Boo Bell. Boo's Crystal Ball, an item that appears in Mario Party 4, is similar to the Boo Bell.