Skip through a lot of the last level

From Glitches

From the game Super Mario Bros. 2 for the NES.

Go to the last level (7-2). The level starts out outside. Walk to the right and into the building. Keep going to the right and climb up the chain to the next screen. Once there, go to the left, past the sparks and to the chain that would take you up a screen. Don't take that chain all the way up. Start climbing it, until the screen is just about to change. Now, while on the chain, jump off to the right. If you keep running, you'll find that the programmers just built that whole section for several parts of the level. Once you get right far enough you'll see Birdo, who usually has a key inside of him. The key won't be in him this time. Instead it's on the conveyor belt, and you can just pick it up and throw it at him.

Submitted by: Brett Notter