World 4-2
World 4-2 is another tower-like stage, with the highlight being the clear pipes. In fact, a majority of the time in the level will be spent in these clear pipes. Mario and the others can go through these clear pipes to progress and find a few secrets. Of course, there will be enemies inside of these pipes, as well as during the regular portions of the level, including Fuzzies, Piranha Plants, and Venus Fire Traps.

World 4-Boss
One boss, so far, has been unveiled, which is a boss that will be fought in World 4. It is a snake-like boss that appears to be the king of its species, as it wears a crown and cape. Players will be able to get a Cat Suit in the beginning, then will ride a lift down to the arena where the boss is located.
When the boss pops out of the ground, it will send rocks flying into the air that will come down and attempt to hit the characters. Avoid them and then smaller snakes will appear out of the ground, with plates on top of their heads. Players will need to get high enough from one of the lesser snakes and jump on top of the main snake to hit its weak spot. The pattern starts over from the beginning and once it has been hit 3 times, it will be defeated.