Neutral Special 2 (Rising PK Flash)
Can be detonated practically instantly, it's the opposite of the default PK Flash in that the horizontal distance it covers is negligible but it will constantly move upwards instead of for a set period, will go from the bottom of Battlefield right to the top of the screen.
Does 5% at minimum charge and only 23% at max charge, the blast radius is about twice the size of the default NSpecial though.
The large blast radius and high vertical distance means it's quite useful as a move for getting players falling to the stage.
Move still puts you into special fall.