Tabuu

Taboo (also known as Tabuu) is the final boss in the Subspace Emissary mode of Super Smash Bros. Brawl. He he has two forms, the second one including an enormous ethereal wings. He seeks ultimate power by bringing worlds into Subspace, using the guise of Master Hand as a means to enlist the help of Ganondorf and other villains. When Ganondorf meets him, he quickly dispatches of him and turns him into a trophy. He also takes down most of the heroes led by Mario in another fell swoop, though not getting the small group of Ness, Luigi, Kirby and King Dedede who begin freeing characters. Taboo also faces a challenging opponent in the form of Sonic the Hedgehog, who arrives just in time for the final battle.

Taboo
The ruler of Subspace and master of operations. Tabuu controls Master Hand with chains of light to excise this world and build up his great maze. He used Shadow Bugs to form Subspace and manipulates the servants of Master Hand to his heart's content. Born in a vastly foreign realm, he also possesses great leadership powers. Tabuu... No name is more suitable.

Winged Taboo
Tabuu with wings extended. The dreadful energy surges cast from these wings instantly turn all fighters back into trophies. Knowing this, King Dedede assembles all able-bodied troops and sets a timed device on each of them. This device is a brooch that, after the designated time runs out, revives all fighters wiped out by Tabuu.