World 4-Airship (Super Mario Bros. 3)
From the Super Mario Wiki
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World 4-Airship is the ninth and final level of Giant Land in Super Mario Bros. 3. It becomes accessible after clearing World 4- 2 and its own completion will allow the player to progress to Sky Land.
Like with the other airship courses, a Toad asks the player to recover the magic wand stolen by a Koopaling, in this case, Iggy Koopa. Iggy's airship auto-scrolls at a slower speed than the other airship courses, and is made up of long, broken up platforms lined with many Rocket Engines that expel flames either vertically or horizontally. The airship is also split between two paths, with the bottom consisting of the Rocket Engines, and the top being more spaced out and having a Bolt Lift bridge the first gap, and a power-up on the second platform. Rocky Wrenches are also placed in several different areas, mostly along the top path. Directly after the Warp Pipe to Iggy's chamber is a ? Block with a power-up. Iggy Koopa is quick and fires his wand frequently, and the uneven layout can make jumping on him difficult. After jumping on him three times, he will drop the wand and the King of Giant Land will return to normal.