Mobius Encyclopaedia:Sandbox/Dr. Eggman (M:25YL)

Prior to Final Defeat
Sometime prior to his final defeat, Dr. Eggman appraoached Dimitri for help in providing aid to his empire. When the Grandmaster refused, Eggman ripped him from his life support equipment in a fit of rage.

Final Defeat
As revealed in a flashback, Eggman was permanently defeated by Chaos Knuckles when he zapped him with a powerful blast of Chaos energy.