Power of Flight
From the Super Mario Wiki
Power of Flight is the up special move used by Pit and Dark Pit in Super Smash Bros. for Nintendo 3DS / Wii U, replacing Pit's previous up special move from Super Smash Bros. Brawl, Wings of Icarus. It is based upon the limited flight power granted to Pit by Palutena in Kid Icarus: Uprising for the game's flight combat sections, as Pit cannot fly on his own. When used, Pit briefly charges up and takes off in the direction the player holds the stick in a quick burst of movement.
Dark Pit and Pit also share custom variations of this move. The first is Striking Flight, which deals damage as Pit or Dark Pit takes off, but can only be used to move at a slight left or right angle; Dark Pit's version of the move also deals slightly more knockback and damage than Pit's. The second variation is Breezy Flight, which does not send Pit or Dark Pit as high, but is faster to execute and creates a whirlwind when taking off that pushes away opponents.