New Super Mario Bros.: 8-1

It's the last world! This part of the world is dark and spooky. The enemies in this level are mainly Bullet Bills, pumpkins, and crows. One of the item blocks will give you a spring. Place the spring on the stones to the right and bounce off the screen to go off screen, where the first Star Coin is. You have to line up the spring because there is nothing else out there. Farther into the level, you'll encounter a few Boos. The second Star Coin is high and two the left of two Bill Blasters, on different levels. Bounce off of a Bullet Bill to reach. The third Star Coin is low in a gap, so drop down to get it and wall jump quickly to safety. Bounce off the Banzai Bill and you'll soon reach the flagpole.

Super Mario 3D Land: 8-1

World 8 is filled with lava. This level is full of spiky things. Spike balls and Spinies are in the first area. We dodge both and fall.
Take 2- We hop up to the alcove with two Fuzzies and take the yellow platform up. Next is a green pipe that takes us to a down escalator with spike balls at the top. Past it is the midpoint. We hop up the brick block to reach the second Star Coin. One of the blocks will attach to you, like the Propeller Block, and give you coins every time you jump. You can still climb the pole to the orange Mystery Box. That warps us to an area where we'll be chased toward the screen by spike balls. We have to dodge them. At the end are a green pipe and a cannon. We use the cannon to reach the flagpole. The green pipe will take you there, as well.
Take 3- I fell trying to get the first Star Coin.
Take 4- We go to the left of the large spike ball and walk along the wall to the red ! block. Hitting it repeatedly makes blocks to the first Star Coin appear. You don't have to run all the way back, just stay over the ground. We reach the midpoint. We reach the flagpole.
Take 5- I died from a spike ball.
Take 6- We use the cannon and look to the left to find the third Star Coin. We land on the ramp and take the green pipe to the flagpole.

New Super Mario Bros. Wii 8-1 QSC

You need to be taller than regular Mario to get the 3rd Star Coin. It's just at the end of the level. There is a Buzzy Beetle so you can break the wall and slide underneath it. I used the spring to break through the blocks that surround the Star Coin and sprung to get it.

New Super Mario Bros. Wii: 8-1 -- Pele is Angry

This level is very similar to one in World 8 of the prequel. The volcanoes in the background periodically erupt, raining flaming rocks down on the level. The flaming rock can take out anything but the solid rock that the level is made of, including solid white blocks, item blocks, and brick blocks. As if that weren't enough, there are lava pillars that will temporarily block your path. The only enemies are Buzzy Beetles, and to add insult to injury, the only powerups in the item blocks are Fire Flowers, and Buzzy Beetles are fireproof.

Take 1- I got a Fire Flower, but lost it to the flaming rock. I lost the Super Shroom to a lava pillar and fell in the lava.

Take 2- I got a Super Shroom. There are unstable platforms that will tilt and tip over into the lava. Over these, coins will suddenly fly into place, which is a startling distraction. I lose 2 Super Shrooms to Buzzy Beetles and died from a flaming rock.

Take 3- I got a Super Shroom, a 100-c0in 1-up, and a Fire Flower. I used a tilting metallic mushroom platform to get over a lava pillar. I lost the Fire Flower to another lava pillar. I got the first Star Coin and reached the midgate. Under a ledge I see a POW Block and some blocks over the lava. I recognize this as a place to hide a Star Coin in the sky, so I use the POW Block and coins, including the 2nd Star Coin rain down. I fell in the lava.

Take 4- I got a Super Shroom and the 2nd Star Coin. I lost the Super Shroom to a lava pillar, but go up the green pipe and reach the goal.