Professor Gerald Robotnik

Professor Gerald Robotnik (プロフェッサー・ジェラルド・ロボトニック, Purofessā Jerarudo Robotonikku ?) is the grandfather of Maria Robotnik and Dr. Ivo "Eggman" Robotnik. Fifty years before the main series, he attempts to create the "Ultimate Life Form" under the funding of the United Federation, hoping that it can help cure Maria's illness. He appears in Sonic Adventure 2 and Shadow the Hedgehog