Knuckles performing the Spiral Upper in Sonic Adventure 2
A spinning uppercut
The Spiral Upper (スパイラルアッパー Supairaruappā?) is a move performed by Knuckles the Echidna. It first appeared in Sonic Adventure 2 and Sonic Adventure 2: Battle and later in Sonic Advance 3. It is a technique where Knuckles performs a spinning uppercut and is a variant of the Punch Attack. It is the equivalent to Rouge the Bat's Screw Kick.
When Knuckles performs the Spiral Upper he shoots himself directly high into the air while spinning around. He then delivers a direct uppercut to whatever enemy that might be above him.
Sonic Adventure 2 and Sonic Adventure 2: BattleEdit
The Spiral Upper first appeared in Sonic Adventure 2 and its remake, Sonic Adventure 2: Battle. It is performed in gameplay by rotating the joystick in a 360-degree angle, then pressing the X/B button quickly. The Spiral Upper can later be enhanced with the Hammer Gloves, which allows it to break iron craters. In these games Knuckles move with such speed when performing it that he leaves afterimages.
Sonic Advance 2Edit
Sonic Advance 3Edit
In Sonic Advance 3, Knuckles can only use the Spiral Upper when his partner is Tails. Here, Knuckles must be the character the player controls, and Tails serves as the character that follows the controlled character. With Tails' influence, Knuckles' Double Punch is automatically transformed into the Spiral Upper, which is performed by pressing the B button. In this game, Knuckles does not jump nearly as high as in Sonic Adventure 2, but the force from the jump engulfs his fists in fire and gives him a wider attack range.