Spiral Attack

The Spiral Punch is basically the Double Punch performed at high speeds. It is a move used only by Knuckles the Echidna and has only appeared in Sonic Advance 2.

Usage
In order to perform the Spiral Attack, Knuckles must perform the Double Punch while in Boost Mode, which can be reached by running at high speeds for a certain amount of time or using a Dash Panel. The resulting speed from the Boost Mode will then transform the Double Punch into the Sprial Attack.

When using the Spiral Attack, Knuckles will launch himself spinning through the air for a short time, while keeping his fists in front. This increases Knuckles' attack range, and the force from the speed will engulf his fists in fire. Foremost however, the Spiral Attack Knuckles to maintain the speed he is running at and remain in Boost Mode, unlike the normal Double Punch which would make Knuckles slow down.