The Hammer Whirl (空中回転ハンマー,Kūchū Kaiten Hanmā?, lit. "Midair Spin Hammer"), also known as the Mid-Air Hammer Swirl and the Spinning Hammer Attack, is a move performed by Amy Rose. It first appeared in Sonic Advance and returned later in the sequels, Sonic Advance 2 and Sonic Advance 3. It is a spinning move Amy performs with her trademark Piko Piko Hammer, while falling through midair.
The Hammer Whirl performs very similarly to the Spin Hammer Attack. When performing the Hammer Whirl, Amy must be positioned in midair. She will then pull out her Piko Piko Hammer and swirl it around while falling straight downward.
The move will automatically stop when Amy lands on the ground, but if she hits an enemy with this move, she will bounce higher into the air while continuing the attack. This can be proven useful on some bosses. Unlike the Spin Hammer Attack however, Amy will not get dizzy from using the move and she can manipulate her movements better.
The move first appeared in Sonic Advance under the name Hammer Whirl. During gameplay, the move is executed by pressing the B button and down while in the air.
Sonic Advance 2
The move returned in Sonic Advance 2, this time under the name Mid-Air Hammer Swirl. Its execution in gameplay is identical to that in Sonic Advance although it can also be executed by pressing down and R while launched into the air by gimmicks such as springs as her down Mid-Air Trick Action. However Amy will bounce back up into the air even when hitting the ground.
Sonic Advance 3
In Sonic Advance 3, Amy can only perform the Hammer Whirl if she is teamed up with Sonic, Cream or Knuckles. The controls needed to perform this move are identical to the previous Sonic Advance titles' controls. In Cream's case, she must use any item that lets her perform tricks and then the player must press down and R as in Sonic Advance 2.