Dr. Eggman is a mythic Legendary Creature — Human Scientist card from Secret Lair Drop (SLD), collector number 2084. Current market price: $1.69, TCGplayer market prices via Scryfall.
Flying At the beginning of your end step, draw a card. Then each opponent faces a villainous choice — That player discards a card, or you may put a Construct, Robot, or Vehicle card from your hand onto the battlefield.