Shuttle Loop

Meta Knight's Shuttle Loop in action.

Shuttle Loop is a new Special Move, which is used by Meta Knight in the upcoming game, Super Smash Bros. Brawl. Shuttle Loop has been confirmed to be his Up special move. However, not much is known about the attack at this point. What is known, is that it launches Meta Knight upwards, acting as his third jump, similar to most Up special moves. It appears to do the same as Marth's Dolphin Slash, as Meta Knight leaps upwards with his sword.

Trivia

The Shuttle Loop is actually a pre-existing maneuver. It was first used by Kirby in the SNES game Kirby Super Star when he received the Wing ability.