Invisibility

Invisibility is a special move used by Amy Rose in Sonic the Hedgehog (2006). By concentrating her energy, Amy can become totally invisible.

Description
To perform, the Square or X button (depending on method of gameplay) must be held down for a short time. Amy will turn completely invisible for 15 seconds. Amy cannot be found by the enemy, however, she is not 100% invisible, as her Piko Piko Hammer and shadow can still be seen. It is unknown why Amy was given this power in Sonic the Hedgehog (2006) but it may be because, Amy always had this power but simply never had a chance to use it.