Sonic was captured and was being experimented on by Eggman,but Tails came in there to rescue Sonic, and the experiment went wrong and Sonic turned into Exedarker, and Exedarker kills Eggman in a sec and Left Tails alive but He wanted Tails to be with him forever and for all eternity.

Sadistic, Menacing, Evil, A Exe, Scary Bean, and is 1% Yandere

Abilities: Psychokinesis, Energy manipulation, Dark matter Manipulation, Teleportation, Enhanced Combat, Cytokinesis, Pyrokinesis, Dark Puppetry 