Ocean Base

Ocean Base Zone is an underwater base in Sonic Advance 3 which will prove difficlut if the Zone is recklessly played. The Zone features polluted water and waterfalls that work similarly to the sand falls of Sandopolis Zone that Sonic can ascend to get to higher areas.

Other obstacles include giant crushers (some of which will sprout spikes a short while after you land upon them) and spike pits. Features here include giant fan propellors that slowly rise as you jump upon them (similar in appearance to a smaller feature in Sky Canyon, Sonic Advance 2) conveyor belts, and rails that sometimes offer an alternative path to underwater routes.