The Fire Somersault is a more powerful version of the Somersault, which can only be used by Sonic the Hedgehog and Shadow the Hedgehog if they possess the Flame Ring. It has only appeared in Sonic Adventure 2 and in Sonic Adventure 2: Battle.
In order for Sonic and Shadow to use the Fire Somersault, each has to possess the upgrade called the Flame Ring. The mechanics between the regular Somersault and the Fire Somersault is identical, with the user performing a body flip and attacking with his feet. The difference however, when performing this move, the user is enveloped in a fiery, fire-like aura which amplifies the move's power greatly, thus allowing the user to break the metal containers found throughout the stages and other tough obstacles.
- This upgrade is manditory for Sonic, while optional for Shadow.