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The Spin Charge is Sonic's down special move in Super Smash Bros. Brawl and Super Smash Bros. for Nintendo 3DS / Wii U. It is a Sonic technique that originated from Sonic the Hedgehog 2. The attack is very similar to the Spin Dash, but it has the potential to move faster. If Sonic uses this attack, the player must tap the special move button repeatedly to charge the attack even further. Charging it up gives it a huge power and speed boost, more so than the Spin Dash's charge. When the player taps the special move button but doesn't keep tapping it, Sonic will stop spinning, which could fake out the opponents. The attack is very similar to Jigglypuff's Rollout attack.
In Super Smash Bros. for Nintendo 3DS / Wii U, the Spin Charge has two custom variants: Auto-Spin Charge and Gravitational Charge. Auto-Spin Charge removes the need of tapping the B button repeatedly for it to charge. Gravitational Charge pulls opponents in front of Sonic and towards him, then pushes them behind him and away from him.