Wario Land 3: Part 70: Beneath the Waves (Green Chest)

In the "Beneath the Waves" section of Wario Land 3, Wario encounters Octohons that have grown after eating a sapling. He must smash through barricades to open new paths, choosing the left path at the start to avoid bubbles and obtain the Green Key. Returning to the center doorway surrounded by currents, he uses the zipline pulley room to land in the island doorway at 1:30. In that room, he enlists a Silky to transform into Ball o'String Wario, rolling through an otherwise impenetrable wall to reach the Green Chest, which contains a Red Chemical.