Doubleflight

Doubleflight (ダブルフライト) is a technique introduced in Kingdom Hearts Birth by Sleep. It allows the user to leap higher by means of a second jump.

Mechanics
In Kingdom Hearts Birth by Sleep, Doubleflight is a exclusive to Aqua that is activated by pressing,  in the Japanese versions, while in mid-jump. It has a maximum level of 1.

In Kingdom Hearts 3D: Dream Drop Distance, Doubleflight is a exclusive to Riku that is activated by pressing  while in mid-jump.

Kingdom Hearts Birth by Sleep

 * Aqua obtains Doubleflight after encountering Captain Hook in the Gully.

Kingdom Hearts 3D: Dream Drop Distance

 * Riku can obtain Doubleflight from a chest at the Delusive Beginning.