The 1st secret World of New Super Mario Bros. 3 (Silver-zoroark's version).
Goombas and Koopas appear in this forest level. There is also poison water and Skeeters.
Another forest level, with Wigglers. For the other half of the level Dorrie carries Mario on the poison water.
A level in a temple, with Fuzzies and Spikes.
A tower with small cannons. There are some Bone Enemies and such. Also it is one of the only levels with Swoopers.
There are docks and a Spike Bass underneath. But the water is poisonous.
Another forest level with lots of bouncy mushrooms. Squigglers are also introduced.
Level Shell-Ghost House
There are Boos and Balloon Boos but no Boohemoth this time.
There are lots of platforms in this castle. Also the new enemies, Dark Wigglers appear. Petey Pirahna is the boss of this Castle.
Easy: 4 Skeeters
Normal: 6 Skeeters
Hard: 8 Skeeters