Drill Claw

The Drill Claw is a move perfomed by Knuckles the Echidna. It first appeared in Sonic Adventure 2 and Sonic Adventure 2: Battle and later returned in Sonic Advance 2 and Sonic Advance 3. It is a offensive spinning drop that Knuckles attack his opponents with.

Usage
To use the Drill Claw, Knuckles must be placed in midair, be it from a jump or from gliding in air. When performing the Drill Claw, Knuckles will then dive directly down through the air while spinning, with his fists pointing downward and he will damage any enemy he comes in contact with below him. This is similar to the Spiral Upper. If Knuckles possesses the Shovel Claws while performing the Drill Claw and he makes contact with the ground, he will automatically perform Dig. The performance of the Drill Claw can also be stopped before reaching the ground, allowing Knuckles to either fall normally or resume his Glide, making the Drill Claw a good way for Knuckles to quickly descend while gliding. In Sonic Advanture 2 and its remake, the Drill Claw can be enhanced with the Hammer Gloves, which allows it to break iron craters.

The player can perform the Drill Claw in Sonic Adventure 2 and Sonic Advance 2 by pressing the B button while Knuckles is in midair. In Sonic Advance 3 however, Knuckles must have Amy Rose as his partner. Here, Knuckles must be the character the player controls, and Amy serves as the character that follows the controlled character. With Amy's influence, Knuckles can perform the Drill Claw by pressing down on the D-pad and the B button on the same time.

In Sonic Adventure 2, Knuckles will dive down so fast while performing the Drill Claw that he leaves afterimages, and in Sonic Advance 2 and Sonic Advance 3 Knuckles' fists will be engulfed in flames when using it.