Dimitri was one of the oldest living Mobians, having been fused with the power of eleven Chaos Emeralds hundreds of years ago and becoming an incarnation of the functionally omnipotent being known as Enerjak. After the loss of his power, which was stolen by Mammoth Mogul, Dimitri had the majority of his body replaced with cybernetic parts, and was in control of the Dark Legion for some time; leading numerous failed schemes against Angel Island. This changed when he attempted to bridge the gap between the two Echidna societies peacefully, partly as a result of his deteriorating health. He would eventually be reduced to a cyborg head, deposed Grandmaster of both Legion and Dark Egg Legion, and repentant ally to his old adversary and distant relative, Knuckles the Echidna.