World 1 (New Super Mario Bros. Wii)

Mushroom Plains is the first world in New Super Mario Bros. Wii. It has six levels, an Goomba to enounter. Larry Koopa is the first boss to be fought in the game. This world features typical grassy plains and many different environments similar to New Super Mario Bros. and the first world in othergames.

1-1
The first level of the game is a generic grassland level. In the beginning of the stage just like in New Super Mario Bros., Princess Peach's castle can be seen in the background. This also introduced the Propeller Mushrooms.

1-2
This level takes place in underground. Special power-ups and items include Ice Flowers, Fire Flowers and POW Blocks are used there.

1-3
This is the first stage in which Yoshi appears.

1-5
This Is The First Sky level in the Game.

World 1-Castle
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