My drawing is terrible but lemme explain how it would work. This would be the first boss in my (maybe) future fan game, Sonic: Eggmans Revenge taking place in Act 3 of Emerald Island. He will use the Drill Eggman (Sonic 2) with the hammer from Sonic Advance to protect him from being hit by Sonic. (The multiple hammers are after images my drawing is bad) So he'll be driving around while the hammer is swinging back and forth.
Sega. Sonic Team. My future fan game (maybe), Sonic: Eggman/Robotnik's Revenge