World 15-2 (Super Mario Maker for Nintendo 3DS)
From the Super Mario Wiki
World 15-2 is the second level of World 15 of Super Mario Challenge from Super Mario Maker for Nintendo 3DS. It is based on World 8-Airship from Super Mario Bros. 3. However, instead of the autoscroll being fast, it is slow. Also, two of the Rocky Wrenches are big. A Winged Super Leaf and two Winged coins appear together twice throughout the level, as well as four groups of three Winged coins. Also, near the Warp Pipe to the boss and in the boss arena are Super Mushrooms on Fire Flowers in Hidden Block and ? Blocks respectfully. The boss fight is against Bowser Jr. in a Koopa Clown Car. Defeating him allows the player to get out of the boss arena through the only available Warp Pipe (as the other is blocked by Hidden Blocks) and hit the Goal.