World 5 (New Super Mario Bros. Wii)

Toxic Forest is the fifth world of New Super Mario Bros. Wii. The levels are all forest themed feauturing poisonouse water. There are eight levels in this world, two of them being castle levels that are guarded by Iggy Koopa, and one being a Ghost House. Various Mushroom Houses are also found around here, giving the player items such as Starmans, Mushrooms, and Propeller Mushrooms. On the map, there are Stalking Piranha Plants. Mario and the gang can get attacked by and be forced to play in the Enemy Course.