The Propeller Hammer (プロペラハンマー Puroperahanmā?) is a move used by Amy Rose in Sonic Heroes and the console/PC version of Sonic Generations. It allows Amy to temporarily fly by spinning her Piko Piko Hammer.
When using the Propeller Hammer, Amy jumps into and pulls out her Piko Piko Hammer. She then begins swirling around with her Piko Piko Hammer in a manner similar to a Helicopter rotor, granting her limited flight.
The Propeller Hammer first appeared in Sonic Heroes as a move the player can perform during gameplay. In this game, it allows the player to move slowly through mid-air, making it possible to hover over gaps and bottomless pits. This flight ability only lasts for a few seconds however, before it no longer can be sustained and Amy will drop. When using the Propeller Hammer, Amy leaves a trail of pink hearts.
To use the Propeller Hammer in gameplay, the player must hold down the / button in mid-jump. The traveling distance of the Propeller Hammer can be increased by performing a sequence of moves; first use the Propeller Hammer, then use the Tornado Jump before running out of flight, then resume the use of the Propeller Hammer, etc.
The Propeller Hammer made a cameo appearance in the console/PC version of Sonic Generations. In this game, it appeared in the Amy: Topsy-Turvy Challenge Act where Amy uses it to race against Classic Sonic to the Goal Plate. Here, it appears that Amy has perfected this move as she can use it to fly through the air and change her height at will.
- The Propeller Hammer serves as a substitute for the Triangle Jump, which Amy is unable to perform.