Go to creepy steeple in twighlight town when you enter the mansion (creepy steeple) there will be a bunch of boos gathering you use your hammer and spin around (B and rotate anolog stick) to hit the boos continue this until the boos form to make ATOMIC BOO now its time to kick @** he has 40 hp 0 defense and 4 attack or 6. submmited by m&m twins.