New Super Mario Bros.
Nintendo DS Cameos

Classic Mario Design

When you have completed all of the levels in the game, a Mushroom House appears in World 1 where you can buy custom backgrounds for the touch screen. One design can't be purchased until you have collected all of the Star Coins in the game, which features 8-bit sprites from the original Super Mario Bros.

Submitted by Fryguy64

Classic Mario Loading Screen

When the multiplayer game is loading, the loading screen features classic 8-bit Mario and Peach from Super Mario Bros.

Peach releases Super Mushrooms and Goombas that make Mario grow and shrink accordingly. Sometimes she will send two Super Mushrooms in a row, making Mario huge.

Submitted by Fryguy64