Don’t underestimate Dr Eggman. While he’s weak he has lots of robots to do the trick. Of course we can’t underestimate Sonic either. In the opening cutscene of Sonic the Hedgehog he took down lots of robots with ease. I think Sonic still wins but Eggman’s robots will give him a good fight. This is all assuming Eggman doesn’t have Metal Sonic with him. Sonic wins.