The fifth and final boss of Sonic the Hedgehog (8-bit), Sky Base Zone's fight takes place in some sort of lightning chamber within the bowels of the Robotnik's airship. The fat man observes proceedings from inside a glass case, while Sonic must dodge scrolling pillars of electricity and the occasional energy sphere which the good Doctor fires in his direction. Simply dodge the attacks and wallop Eggman's position when the lightning generator deactivates. After a moderate amount of damage has been dealt, the timing of the lightning discharges becomes more erratic, so keep on your toes! The boss is different on Game Gear, utilizing flamethrowers, and the pattern does not change when it is close to defeat.
Once Ivo's case is cracked open, Sonic chases him to the end of the level. The obese scientist escapes via a teleporter to Green Hill Zone, but Sonic follows and clocks Robotnik as he flies away in the Egg-O-Matic. The ending scene then rolls, where Sonic's Chaos Emeralds cleanse the taint of smog and pollution from South Island's summit.