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| Legion as he appears in the trailer.|
|Twisted Reality World Boss|
|Affiliation(s)||Leader of a large army, commander of Legion's Finest, allied with General Morden, Dr. Wily, Loki, Beauty, Bacterion, Dr. Eggman, and Crazy Hand|
|Original Appearance(s)||Mushroom Kingdom Fusion|
The player faces Legion in the Twisted Reality level, the Castle of Meat, which is presumably his base of operations. If the proper conditions have not been fulfilled, the game ends after Legion's defeat.
He is quite similar to Tabuu, the primary antagonist of Super Smash Bros. Brawl, recruiting various villians to join his cause and resembling a human.
|Bowser | General Morden | Dr. Wily | Loki | Crazy Hand | Dr. Eggman | 343 Guilty Spark | Legion | Abomination|