The Decent (1-1)
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Mario has saved Princess Peach but Bowser begins to flee on his Airship. Mario gives chase but Bowser activates the self-destruct of the ship and both are sent plummeting down to the Forgotten Isle.
Valley of Piranha Plants (1-2)
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Mario lands smack in the middle of the island and Bowser somewhere off the coast. In a land forgotten by the Mushroom Kingdom, Mario must first get through the Valley of Piranha Plants if he hopes to make home again.
Mount Muncher (1-3)
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After making it through the valley, Mario finds himself confronted by a large mountain. With no choice but to go in, he must find away past the Munchers who call the mountain home.
Forgotten Castle (1-4)
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Mario conquered Mount Muncher and finds his way into an ancient castle, overgrown and overrun by Piranha Plants and the undead Dry Bones. Fighting his way through he must defeat the monster hidden inside if he hopes to survive.