Sonic Boom is Sonic's signature ability in Sonic Rivals 2, but also Metal Sonic's when he is not racing against any other rival or against Metal Sonic 3.0.
The Sonic Boom
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Sonic Boom is Sonic's signature ability in Sonic Rivals 2, but also Metal Sonic's when he is not racing against any other rival or against Metal Sonic 3.0.
The Sonic Boom