Shuttle Loop

Shuttle Loop is one of the moves that Kirby can use via the Wing ability since its introduction in Kirby Super Star. More noticeably, it has been Meta Knight's up special move in the Super Smash Bros. series since his introduction as a fighter in Super Smash Bros. Brawl. The attack involves either character leaping up into the air, slashing once, and then looping around before gaining brief momentum in flight.

Super Smash Bros. series
In Super Smash Bros. Brawl, this move automatically enters into Meta Knight's glide, while in Super Smash Bros. for Nintendo 3DS / Wii U the move ends with Meta Knight dealing a second attack, and then entering a helpless state.

In Super Smash Bros. for Nintendo 3DS / Wii U, this move has two custom variants:

Blade Coaster enables Meta Knight to travel forward instead of up, enabling him to cover more distance horizontally, but it offers less vertical distance, and takes a bit longer to start up. Opponents who are hit by this attack are sent flying at a lower angle.

Lazy Shuttle Loop has Meta Knight performing a slower loop before striking with a single attack. It offers more vertical distance than Shuttle Loop. However, it also removes the initial hit that Meta Knight performs before starting the attack.