This level introduces the Piranha Creeper, a large Piranha Plant that grows out of pipes or holes. If you hit it with a jump, a claw, a Fireball, or even a Boomerang it will retract a little bit. Force it to retract completely and it disappears. Head past the first wave of these enemies to a ? Block that has a convenient Fire Flower , Super Mario 3D World’s form of weed killer.
March through the first area and defeat the Piranha Creeper blocking the pipe to the next zone. Move through this cave to the Mystery Box where you’ll find several Piranha Creepers that form steps up to Green Star #1 . You’ll need precision jumping to bounce all the way up unless you have a Cat Suit to climb up the wall.
Continuing through the cave you’ll encounter more Piranha Creepers, one that guards the water leading down to Green Star #2 but it’s easily dealt with a few Fireballs. Just past this section you’ll spot a Piranha Creeper coming out the side of the wall where water goes down. See through this deception and bounce off the Piranha Creeper and into the wall, to discover that you can walk through this coin filled area to the Stamp . Use the pipe to reach the final area where you’ll discover a Roulette Block .
Warp Zone: If you have the Cat Power-Up or are fortunate to get one from the Roulette Block you can climb the wall here. At the top make your way across the moving platforms to find a Red Pipe that leads to World 5!
Grab the Super Leaf if you can, it makes navigating the area a bit easier plus it has the added benefit of tail swiping the Piranha Creepers. The rotating platforms ahead have a Green Star Ring that you’ll want to activate but take out the Piranha Creepers first so you can easily run through this tight area grabbing the Green Coins and ultimately claiming Green Star #3 .
At the end use the pipe to reach the Goal Pole where you can bounce off a Piranha Creeper to cap it.