Boomstick

The Boomstick is a combined weapon that appears in Dead Rising 2. It is a shotgun with a pitch fork attached to the top (like a bayonnette). It can be made by combining a shotgun and a pitchfork. It's only confirmed form of attack is to stab a zombie with the pitchfork, lift it up, and shoot it off using the shotgun.

Trivia

 * It is unknown if you can fire this weapon or just use it's before-mentioned attack.