Wario Land 3: Part 10: The Pool of Rain (Gray Chest)

Description:

In this level, Wario discovers a magic jar that summons rain over a large dirt valley. Unable to dive underwater, he must use tall platforms to jump across the water, carefully timing his landings to reach the Gray Key and the Gray Chest. The chest contains a Gear, the first of two needed to operate a machine and elevator that lifts Wario to the south side of the Music Box world, unlocking the level The Grasslands.