Spin Dash (Sonic)

Spin Dash is Sonic and Tails' down special move in Super Smash Flash 2. Unlike Sonic's Spin Dash in Brawl, you can hold down the button to charge the attack rather than having to repeatedly tap the button. Both characters' version of the attack has specific characteristics. Sonic's Spin Dash is very fast and hard to control. Tails' Spin Dash is even faster than Sonic's and can not be controlled, both spin dashes can be cancelled by pressing the Special Attack button.

Sonic
For Sonic, when you charge up on ground, you can still move him by using your arrow keys by jumping up first and then go to the direction you have pressed. You cannot do a double jump while charging up. A good technique is to jump up in the air and then unleashing Spin Charge

Trivia

 * Prior to the roster change, this attack was confirmed to also be Shadow and Blade's down special in the game. It is assumed that Shadow's Spin Dash would be more powerful than Sonic or Tails' version of the move, and the effects of Blade's version of the move were unknown.