Mach Speed

Mach Speed is a move used by Sonic the Hedgehog that has only appeared in Sonic the Hedgehog (2006) as one of Sonic's custom moves. It is a move that gives Sonic a short boost of speed. It can only be used after Sonic obtains the Blue Gem.

Usage
In order to use Mach Speed, Sonic has to possess the Blue Gem upgrade. When Sonic is in possession of it, the player has to select the Blue Gem with the directional pad and can use it by pressing Right Trigger/R1 button. When activated, Sonic can slow down time, thus effectively slowing down the surrounding environment and enemies' movements while leaving Sonic himself unaffected. This is a great way for the player to get the upper hand when they are low on rings and are outnumbered.