Sonic the Hedgehog protagonist Sonic the Hedgehog, a blue hedgehog able to run at supersonic speeds, and recurring villain Dr. Eggman, an evil scientist whose ambition is to conquer the world. Among Sonic's many allies, the most well-known include: Miles "Tails" Prower, a twin-tailed, highly intelligent yellow fox who is Sonic's sidekick and best friend; Amy Rose, a pink hedgehog who is Sonic's self-proclaimed girlfriend and a hero in her own right; Knuckles the Echidna, a coolheaded red echidna who is the guardian of the Master Emerald; Shadow the Hedgehog, an anti-heroic doppelgänger of Sonic with a dark past; and Metal Sonic, a
Sonic the Hedgehog 4: Episode II going, so I'd hope to provide Episode 2 then." He also said that Sonic Team "knew about the anniversary year," and that ""Generations" was planned way in advance." As such, "it was always our plan to release Episode 2 after Generations." In preparation for "Episode II"s release, Sega re-released "Sonic the Hedgehog CD" to digital platforms in late 2011, billing it as a 'prequel' to "Sonic 4", as the events of "Episode II" would rely heavily on what occurred in "CD". On December 29, a teaser trailer for "Episode II" was released, and it was revealed that both Metal Sonic