Like Sonic Adventure before it, Sonic Adventure 2 and it's later incarnation of Sonic Adventure 2: Battle on the GameCube introduced us to two new characters.

On this occasion, Sonic's tenth anniversary brought us sexy sassy jewel thief Rouge "Double-Double-Double D" the Bat and that most notorious of plot devices an 'evil' version of the protagonist. His name... was Shadow, and the rest as they say is history!