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Mach Tornado is one of Meta Knight's abilities in the Kirby series, namely Kirby Super Star and its remake. In Super Smash Bros. Brawl and Super Smash Bros. for Nintendo 3DS / Wii U, this move appears as Meta Knight's neutral special move. When used, Meta Knight spins around rapidly, creating a whirlwind around himself that traps opponents and deals damage to them, with the final hit dealing greater damage and knockback. The move lasts longer if the player continuously presses the button, which also gives the move some vertical height, and the player can also move while using the move; the vertical and horizontal distance this move receives are both greater in the air. When the move ends, Meta Knight enters a helpless state if he's in the air.
The custom variants for this move in Super Smash Bros. for Nintendo 3DS / Wii U are Entangling Tornado and Dreadful Tornado.
Entangling Tornado draws in opponents and deals a single hit with greater knockback, but it offers less horizontal control than Mach Tornado.
Dreadful Tornado deals more powerful hits and offers much stronger knockback, but its duration cannot be extended by tapping the special move button. The move also has more ending lag than Mach Tornado, which leaves Meta Knight vulnerable to counterattacks.