This one turned out pretty horribly, due to the fact the levels are long and I didn't know Ocean Base 2, the worst of the three. Also, in Ocean Base 1, I demonstrated a bug after the second chao (which was pointless to repeat as I did it successfully at the last moving platform) which, if you're right at the side of the platform when you rise, you'll stop by standing at the platform.
Also, Knuckles is needed for act 1, but not act 2.
Also, there is no map chao.
Also, for those asking about the chao after the passage... While using Knuckles and Tails, charge a tag action with R to the left of the waterfall that appears at 2'28 game time, then release and make your jump left. That'll get you to the other entrance. Excuse the run-on sentence.
Note: After you get all the chao in this zone, you can grab a key in any of the acts of the zone. The key's location is RANDOM, and once you get the key, you must complete the level without dying. You can only get one key per run in an act, and you use up one key when activating the special stage spring. If you fail (or finish) the special stage, you lose your key.
Appears on these pages
Ocean Base (オーシャンベース Ōshanbēsu) is the third Zone in Sonic Advance 3. It is an secret base...