Ivo "Eggman" He's been in the SONIC series for as long as Sonic has.
pingas is the primary antagonist of the Sonic Boom series.
Free Doctor Eggman Robotnik Cross Stitch Pattern Sonic the Hedgehog
Mario & Sonic: Winter Olympics (Wii) Artwork including Team Sonic and Team Mario characters
sonic vs dr robotnik | Doctor Eggman - Sonic News Network, the Sonic Wiki