He had fought against the 'Freedom Fighters' on many occasions, getting the contemptuous nickname 'Eggman' from the Freedom Fighters. Restoration of the portal was impossible - the scheme was stolen, and his daughter Jessy was killed due to a misunderstanding. Robotnik arrived in Mobius through an artificial portal, which was subsequently destroyed after his arrival.
1.3 Sonic.exe: Nightmare Beginning Remake.