World 3-3 (Super Mario Bros. 2)
World 3-3 starts in the underground with a door at the end. In the next room, there are a Shyguy riding an Ostro, Albatosses, Bob-Ombs, and another door. The next room has Ninjis and Sparks. The next door is located at the other side of the enemies. The next room is a tall room full of Sparks, and the player must scale to the top, where the next door is. The next room is another tall room, with Tweeters, Snifits, Shyguys, Pansers, and a Ninji, with the door at the bottom. The next room has Shyguys, along with the next door. The next door leads to the roof of the fortress full of Ninjis. The Crystal Ball is at the end. Located in the lair is the second Mouser battle (or Robirdo in Super Mario Advance).
This level is notable for containing the only red Snifit in the game, standing on a ledge.