Wario Land 3: Part 68: The Tidal Coast (Green Chest)

That living Statue also provides some climbable grillage in this aquatic level. However, the only way you can reach the doorway for your Green goods is to play this level at night, where the tide will rise. First off, use Bouncy Wario to reach the last high doorway of the first room of this level. Take the next path upwards to reach the Green Key, then go back to the new doorway that the night tide will allow you to reach. Use the new fencing here to carefully climb and maneuver your way towards the Green Chest. You will have to pass through more doorways before you can reach it, and careful not to let the bugs and spiked balls knock you off, either.