Dark Cannon
Dark Cannons are devices wielded by members of the Subspace Army during The Subspace Emissary in Super Smash Bros. Brawl. With a single hit from its black, arrow-like laser, any character will be reverted to their trophy form. Dark Cannons are mostly used by Wario and Bowser; Ganondorf also uses one late in the story. Even Tabuu wields a Dark Cannon as one of his attacks.
This item is not available for the player's use in the game; they appear exclusively in cut-scenes. Players can get a trophy of one by clearing Boss Battle mode on Hard difficulty.
Trophy Description
In this world, those who fall in battle return to their forms as trophies. This Dark cannon is powerful enough to turn a fighter back into a trophy with a single shot. Originally created by the Subspace Army, they were then given to Bowser and Wario for the purpose of collecting fighters who exist in this world.