This land belongs to the Mushroom Kingdom and has been taken over by Wendy 'O Koopa. As you would imagine most of the levels are based underwater and common enemies include Blooper squids and Cheep-Cheeps. Known in the original NES version as Ocean Side this world comprises nine levels, two fortresses, two sets of Hammer Bros and five Toad houses. Morton Koopa Jr is the Koopa Kid who has taken over this land, and is ultimately the boss of Desert Hill.

There are certain enemies which are pretty much exclusive to this land to be seen here - such as the Angry sun and Fire snakes. There is also a special Fire Bro's level which can be unlocked by using a hammer on the rock at the upper right of the screen, beating the Fire Bros will then get you a warp whistle. The second world also known in the re-release as Desert Land contains five levels, two sets of Boomerang Bros, a Fortress, three Toad houses, two special levels which were based in a Pyramid and a quicksand desert. In the original SMB3 the King was turned into a dog, but in the re-release in Super Mario Allstars the King was instead turned into a Cobrat. This land belongs to the Mushroom Kingdom.

The doom ship which has taken over this land belongs to Larry Koopa. 3 features six levels, one set of Hammer Bros, two Toad houses and one Fortress.

Super mario bros 3 world 5 castle 1