Dr. Eggman is the main villain of the Sonic the Hedgehog franchise. He is the first and only grandson of the late Professor Gerald Robotnik and also the cousin of the late Maria Robotnik. He is currently voiced by Michael Pollock in the American English dub.
- Professor Gerald Robotnik (grandfather, deceased)
- Maria Robotnik (cousin, deceased)
- Rukia Kuchiki - His opponent in Sonic Boom: The Emerald Dust Rebellion. Plans to use her as bait to lure in her husband Renji Arabai.
- Hinata Hyūga - His enemy since Naruto: Friend or Foe, ever since he kidnapped her son Boruto Uzumaki (Andrea C. Miller).
- Uryuu Ishida - One of his former allies.
- Itachi Uchiha - One of his former allies.
- Sasuke Uchiha - One of his former allies.
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