Dark Cannon
A Dark Cannon is a weapon wielded by high-ranking members of the Subspace Army during The Subspace Emissary in Super Smash Bros. Brawl. Created to emulate the effects of Tabuu's Off Waves, it fires dark, arrow-shaped beams that revert any character they hit to their trophy form. Dark Cannons can rapid-fire once initially charged up, and their shots can curve, but an aware target can dodge them somewhat easily. The shots can cause explosions if they strike objects or terrain. The shots can hit a character and knock him/her backwards (as with Diddy Kong) or plow straight through the character's body (as with Peach/Zelda)
Dark Cannons are very large and unwieldy; despite Falco being able to kick one high into the air, only characters of above-average strength can carry them properly, based on the difficulty False Peach/Zelda had aiming one.
Dark Cannons are mostly used by Wario and Bowser, although Ganondorf also wielded one late in the story and False Zelda/Peach used one which was destroyed by Link/Pit. The Dark Cannon belonging to Bowser was destroyed by Falco. Tabuu himself does not need to use a Dark Cannon as his Off Waves have the same effect over a larger area (However, another one of his attacks visually resembles a Dark Cannon).
Although the Dark Cannons were built to turn all the characters into trophies, they could only target one person at a time. This forced those with Dark Cannons to take the trophyized fighters away from their groups to prevent them from being easily revived. The characters that were hit by a Dark Cannon at some point include Peach or Zelda, Donkey Kong, Ness, Diddy Kong, and Bowser.
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.