No! Shadow was created by Eggman not Sonic.
Dr. Eggman is evil, not Sonic.
dr. eggman for sure
Dr. Ivo "Eggman" Robotnik's birthday is the same as Sonic's; June 23rd.
No, they are both different villains from the Sonic the Hedgehog series.
The main villain is Dr. Robotnik/Dr. Eggman.