Tabuu

Tabuu is the leader of the Subspace Army, the main antagonist and final boss of Super Smash Bros. Brawl's Adventure Mode and Movie: The Subspace Emissary. He is a powerful, supernatural entity who embodies the dimension of Subspace and rules it as a god. He uses the Subspace Bombs to send entire locations to his dimension, where he absorbs their power to increase his own, pursuing his plan to conquer and subjugate the universe. His name is a corruption of the word taboo, referring to something that is forbidden.

Aside from his appearance in Brawl, Tabuu appears in Super Smash Bros. Ultimate as a spirit.

Tabuu is the true embodiment of Subspace. His plan was to cut World of Trophies into pieces and take them to Subspace for his world. However, he himself cannot leave Subspace, which is why he created the Subspace Army to act in his stead. According to the Ancient Minister trophy, Tabuu took over the Isle of the Ancients, the home of the R.O.B.s, and forced them to serve him under the threat of annihilation. Tabuu first discovered that Mr. Game & Watch had Shadow Bugs in him and captured him to harness the power, and thus the Subspace Army was born. Tabuu studied and took control of the master of the World of Trophies, Master Hand, who he in turn used to enlist the help of Ganondorf, Bowser and Wario. These three were sent to hunt down any fighters that would stand in the way of Tabuu's plans.

Later in the story, after the heroes destroy the Subspace Gunship and enter Subspace, Ganondorf betrays Bowser by using a Dark Cannon. Ganondorf then goes to greet Master Hand. Ganondorf then realizes that Tabuu was actually controlling Master Hand, and that he was not actually following Master Hand's orders but was being tricked by Tabuu. Enraged, he charges a futile attack at Tabuu who effortlessly knocks him back. Ganondorf's body hits the puppeteered Master Hand, thus breaking him free of his chains of light. Master Hand also charges at Tabuu, but to no avail. With Master Hand lying motionless on the ground, Tabuu uses his Off Waves to turn everyone into trophies as soon as they approach.

However, thanks to the Dedede Brooches, two trophies who had been left behind - Luigi and Ness - were later revived, and they proceed to revive King Dedede himself after Ness realised that it was thanks to him that they were restored. King Dedede joins their team and they rescue everyone else by collecting their trophies in Subspace Part 1, including Bowser, who had a fight with Dedede, and joined the team because Tabuu is so powerful, and he killed Master Hand. Around the same time, Kirby was revived by the brooch the captured princess had when he swallowed it and went out to save the rest of the fighters in Subspace Part 2, between the characters, there are Wario, and Link and Zelda, who revive Ganondorf, and suggest him to join them, he accepts, because he can not do anything to Tabuu, Wario does the same, because King Dedede, Luigi and Ness pointed him where are going everyone, so all the characters enter to the adventure. Tabuu then creates a maze out of the worlds that have been consumed by Subspace and brings back the old enemies. He also creates dark clones of all of the heroes to slow them down. Once the player reaches Tabuu, he attempts to turn everyone back into trophies again, but is ambushed by Sonic the Hedgehog, who shatters his wings with a Spin Dash before he can do so. As a result, Tabuu's Off Waves are weakened, becoming "only" a one-hit KO attack instead of causing immediate trophification for any Smasher in reach.

A selection of characters from Sonic, Bowser, Kirby, Luigi's group and those revived by these two groups, then fight Tabuu, until he is defeated. After his defeat, the Subspace Army is gone, lands are restored, and the Isle of the Ancients disappears afterward because of the effect of so many Subspace Bombs going off at once making it impossible for the Isle to escape Subspace. A glowing X is left behind.

Tabuu's true fate is unknown - he is last seen contorting in pain shortly before the Great Maze was restored to its original places and forms - though it is likely he was destroyed.

And he is voiced by Michael Ironside in the English dub and his Japanese voice is unknown.