Help

Firstly, for world 4 and 7, tu MUST have mini seta for this process.

Defeat the boss stage in world 2 and 5 with mini mushroom. World 5 is a bit trickier to beat with mini mushroom, so good luck!

In world 2, all tu have to is ground pound the oruga, caterpillar 3 times. It's a bit trickier than it sounds but you'll do alright.

When tu do defeat the boss stage, tu will proceed in a pathway under the floor.

Good Luck!

^This.