Sonic can turn to dark SuperSonic because he has anger for his friends
The fake emeralds had a negative affect on sonic while he was mad making him become dark super sonic
he became a wherehog because of dr eggmans machine at the beggining of the game then close to the end when sonic was going to kill dark gaia dark gaia sucked the dark out of sonic
In Sonic and the Black Knight, after you defeat the Dark Queen.-----------------------------slightly wrong not after you defeat the dark queen it is how you battle her there is also a transformation cutscene of sonic to king sonic but after the battle is over you can be king sonic unless you play the boss battle again.
no dark SONIC
Dark sonic is not in the game
Dark Sonic Was only In The Sonic X Anime.
There is no dark super sonic!!!!!!! -_-
Once you have all seven rings (only can be used at the final boss).
He turns into Dark SONIC when he is Angry or upset :)
(by the way... its Dark Sonic) When the 7 chaos emeralds are nearby they turn dark and the bring the power to sonic. (Dark Sonic is powerful than super sonic.)
Eggman zapped him with a lazor that destroyed the Earth. Dark Gaia was relleased and his energy was transfered to Sonic and he became a Werehog.
Demon Sonic is merely a fan created power fans gave him. Not real. Don't be fooled by Dark Sonic (which showed up once in Sonic X in the history of all that is Sonic), or Dark Super Sonic either (not that it takes chaos emeralds to become Dark Sonic and was never created by SEGA) also a fan thing. This has never showed up in anything Sonic in his history except for one breif moment in a episode of Sonic X.