Extra Speed (ジェットスクリュー Jettosukuryū?, lit. "Jet Screw") is an item in Tails Adventure.
Location
The Extra Speed can be found in Green Island in a section only accessible by using the Remote Robot.
Functionality
The Extra Speed is an item that can be equipped to the Sea Fox. In order to use the Extra Speed, the player must hold 
. The player let go of and press 
to make the Sea Fox jump higher.