New Super Luigi U: Meringue Clouds-1 -- Frozen Fuzzies

This level features Ice Bros and Fuzzies. The Fuzzies are on looped tracks. The Ice Bros will freeze them so you can use them as platforms. Grab the Penguin Suit so you can freeze Fuzzies on your own. In a long loop of Fuzzies, you'll find the first Star Coin hidden in a cloud. The second Star Coin is in a loop of Fuzzies. Freeze them yourself and use them to reach it. The third Star Coin is in the loop with the Ice Bro in the middle. Kill the Ice Bro, then pound through the ground to reach the Star Coin. There is a loop of Fuzzies to freeze to reach the flagpole.

New Super Luigi U: Frosted Glacier-5 -- Ice-Slide Express

Outside the level are a couple of blocks. Hit them to get the Penguin Suit, then take the pipe underground. This level lets you belly-slide through most of the level. The rolling hills will let you gain a little momentum. When the path splits, jump for the first Star Coin. Nearby is a Silver Ring which makes Silver Coins appear. The Silver Coin trail leads to a Red Coin Ring and the second Star Coin surrounded by brick blocks. Slide into the brick blocks to break them and get the Star Coin. Towards the end of the level, you'll slide up a large slope, then drop down the water. There are blocks of ice floating in the water under pipes with Piranha Plants. Get a running start, slide, then jump when the path splits to hit some brick blocks and break them. This will allow you to reach the third Star Coin, which is hidden in the alcove above before you reach the pipe. There's an 8-bit Luigi in the alcove. The pipe takes you to the flagpole.

New Super Luigi U: Sparkling Waters-4 -- The Great Geysers

The water spouts become geysers here, meaning they are much larger. You can get the Penguin Suit here. You'll start on solid ground, then you'll have to deal with the geysers. Cheep-Cheep will fly out of the water and drop back down, so be aware of where they are. The first Star Coin is in the second geyser, under some blocks. Wait for the geyser to drop down, then swim quickly to get it. The P-Switch makes Silver Coins appear. Keep going past the Water Piranha Plants and jump up the trees. The second Star Coin is over a tree. The third Star Coin is with a Water Piranha Plant. You can drop down on it if you're powered up, or use a shell to kill the Water Piranha Plant and grab it. The flagpole is nearby.

New Super Mario Bros. Wii 3-1 QSC

I got the 2nd Star Coin by freezing the Piranha Plant past the midgate. I saved myself with a wall jump. Using the Penguin Suit, I broke the blocks in front of the green pipe past the green pipe to the next part of the level. I froze a penguin and rode the ice block and jumped to get the 3rd Star Coin.
124 down, 83 to go

New Super Mario Bros. Wii: 4-3 -- Mini Mario Goes to the Beach

This level has 1-armed crabs throwing stones at you. I kill some of them, and get and lose a Penguin Suit. I lose and get a Super Shroom. I get the first Star Coin and another Penguin Suit, which I lose to an Urchin. I skip the 2nd Star Coin. I get a Mini Shroom and reach the midgate, but do not power up. I can't enter any of the nearby mini pipes, so I keep moving. I then run on water to the mini pipe that has the 3rd Star Coin. I get a 100-coin 1-up and reach the goal.

New Super Mario Bros. Wii: 4-1 -- No Place for Penguins

This is a beach level, with part of the level underwater. I get and lose a Penguin Suit. I can't reach the first Star Coin nor the Red Coin Ring. There are large and small Cheep-Cheeps here, including blue ones that chase me near the pipes with current jets. I get and lose another Penguin Suit to a blue Cheep, but I get a 100-coin 1-up. I utilize a Starman, but do not get a 1-up. I reach the midgate and get another Penguin Suit. I miss another Star Coin. Twice I lose and gain Penguin Suits. I see giant Urchins, that don't move and mostly sit at the bottom. I fail to ground pound them after freezing them and lose my Penguin Suit. I reach the goal under the stair pipes. Swimming is very different with the Penguin Suit. Instead of pressing (2) to keep from sinking, the suit allows you to completely control it in water using the control pad. This was startling at first and takes some getting used to.

New Super Mario Bros. Wii: 3-1 Replay -- Seeing Improvement

I start the level powered up as Fire Mario. I use fireballs to kill off some penguins, but lose the Fire Flower to another penguin. I get the Penguin suit, but lose it to a Piranha Plant. With the Penguin Suit, you can't pick up anything because your hands are in flippers, and the just-in-time instructions for picking up stuff are missing. I get another Penguin Suit and the 1st Star Coin. I lost and got another Penguin suit to a penguin, and fall into the void. Take 2- I get a Super Shroom and saved myselft with wall jumps. I got a 100-coin 1-up and reach the goal.

New Super Mario Bros. Wii: 3-1 -- Penguin Skeleton

I lose my Super Shroom to a creature that looks like a penguin, so that's what I'll call them. Before I was hit, I hit a block to reveal the Penguin Suit! This suit allows the player to slide on their stomach over the ice and slopes. I got the first Star Coin, but while sliding, I ran into a Piranha Plant, but ended up surprisingly unharmed. Maybe it's due to the beak on the suit. However, I lost the suit to a Koopa. I reached the midgate and lose the Super Shroom to another Koopa. I got another Super Shroom after the pipe, and lose it to a penguin. I saved myself several times from the void with wall jumps, but accidently pounded the ground into the void.

Take 2- I got the Penguin Suit (This was done a week after Take 1). After I froze a Piranha Plant, coins appeared over the pipe. I got the 1st Star Coin and reached the midgate. After the pipe, there is an area great for sliding, but while sliding, I missed land and fell into the void.

Take 3- I saw, but did not get the 2nd Star Coin floating above a horizontal pipe. It probably contains a secret if you can freeze its Piranha Plant to enter the pipe. I found another pipe blocked by blocks that also may contain a secret. I got a Super Shroom and a 100-coin 1-up. I saved myself with a wall jump, lost my Super Shroom to a penguin. I needed to build up speed to clear a gap and save myself, did so, and reached the flag post.

If you're wondering about the title, Skeleton is a Winter Olympic sport similar Luge. Whereas Luge involves sliding on your back, feet-first, Skeleton involves sliding on your stomach, face-first. With the Penguin Suit, you slide on your stomach, face-first, like Skeleton, instead of sitting down without it.