World 8 (New Super Mario Bros. Wii)

World 8 (New Super Mario Bros. Wii), is the final world in New Super Mario Bros. Wii, excluding the secret ninth world, Rainbow Path. The world has a grand total of ten levels.

The Tower here leads to a fight with Kamek, who previously in the game is only seen enhancing the Koopalings when the heroes reach them in Castles. This world also features the third and final fight with Bowser Jr., once again on an Airship. The final level here features the two-part battle with Bowser, who is not once seen in the game up until that point. The Enemy Course in the level are Podoboos between 8-3 & 8-Tower; on the bridge.

World 8-1
In World 8-1, Mario and Co. have to go through a volcanic area full of lava. Raining Debris fall from the sky, which are hard to dodge as there are rising lava spouts, which block the players temporarily from progressing further if they don't have the Propeller Suit. Also, a cloud of hot ashes will chase the players from the left to the right. The hot ashes will instantly take out the heroes on contact, so they have to hurry.

World 8-2
This level contains more falling debris and with spinning wheels on the ground. As soon as Mario and co. enter the pipe, they end up in an underground area filled with more lava. Goombas will appear many times on this stage, along with the spiked balls. The team will just have to dodge the obstacles and will get through. However, there is a secret exit, after the Mario team passes a yellow and a red pipe, they will see more spiked balls rolling forward slowly. Right at the ledge, if the team drops down and heads right to the wall, a secret entrance will allow them to enter a pipe further if they keep heading right.

Once gone into the pipe, the team will see that the ground is spinning very fast. They'll have to either keep jumping until the end. They must also watch out that Goombas can appear on the spinning ground. Once they get through, they'll open up the secret exit to 8-7.

World 8-3
The level starts out with giant lava waves that can cause instant kill to Mario and co. if not careful. This level also has also chained platforms and blocks that sink when one of the characters weight is added to them. The first star coin is located the second chain platform right near the beginning of the level. Best way to go is to stand near the end when the lava wave is at its trough point, and wait for the platform to sink far enough to grab the coin, and quickly jump back before the lava reaches you. The second coin is much more challenging to catch, since it is under a platform that is constantly hit by lava waves just after the midpoint. To grab it, just wait for the lava to open the entrance to the left, then sprint to grab the star coin, and either exit before you touch lava. The final coin is not until near the end of the level. You must wait for the lava to pass its crest stage, and run down the slope, and jump just as you able to enter the platform. Grab the coin, then quickly jump onto the platform above so you aren't burned by the incoming lava. Continue the level, pass the remaining sinking blocks, and go through the green pipe at the end. On the other side of the green pipe, jump on the two chained platforms onto the flagpole to finish the level.

Enemy Course

 * Four Podoboos
 * Six Podoboos
 * Nine Podoboos

Best course of action in these Enemy Courses is the use the Ice Flower against the Podoboos, being the only way to defeat them.

World 8-Fortress
This tower is the first level to feature firebars. There are also moving rocks that can easily crush Mario and make him lose a life. Kamek is fought at the end.

World 8-4
After falling down a deep tunnel, Mario and Co. will have to deal with several Stone Spikes. There are Bulbers in the water, but they don't attack; they help the player see. The second part of the level is infested with Jellybeams. They are the only light source in the level. For the final part, the player will have to swim upwards through some pipes that make strong water currents. After entering a pipe the exit will be close.

World 8-5
This course is a side-scrolling course, featuring platforms that can be moved by rotating the Wii Remote. At the start, Bob-ombs will descend by parachute to try to harm the player. Past the checkpoint flag, lava geysers and even Crowbers will try to overwhelm the player. If the player isn't careful, he/she may fall into the lava below. It is easy to run out of time in this level.

World 8-6
This course features rising lava. The player will have to advance upward real quickly to avoid it. During the second part of the level there are some pendulums that help the player keep climbing. All of the Star Coins are in plain sight.

World 8-7
The level is secret, in which can only be unlocked by taking the secret path on World 8-2. This is the first and only level were players will see the Bonecoasters. There are a total of five coasters throughout the level (two at the underground section, three at the above ground section). The Bonecoaster helps the four dodge the lava geysers that are constantly shooting from the lava. The first Star Coin is located on the second Bonecoaster, where it is barely above the lava, which Mario, Luigi, Blue Toad, or Yellow Toad must grab as the Bonecoaster comes out of the lava. The second star coin is located above two lava geysers, which the four must jump off the third Bonecoaster to grab it. The last star coin is found between the four and fifth Bonecoaster. Mario and co. must stay on the fourth Bonecoaster, grab the coin, and jump to the fifth Bonecoaster before they touch the geyser. After the Bonecoasters, it is a short jump onto the flagpole, which leads Mario and friends to 8-Airship.

World 8-Ship
The last Airship level in the game. The main enemy in the course is the Mecha-Koopa, but the biggest danger in the level is the cannons and the players will have to dodge a barrage of cannonballs at one point. At the end is the last battle against Bowser Jr. In some parts of the level the player will have to spin screws in order to keep going.

World 8-Castle
Despite being the last castle, Bowser's Castle is much shorter in this game than it was in New Super Mario Bros..

For the first (out of 2) room, there are lots of Podoboos, which will jump out of the lava and try and get the player. The second room has lots of falling platforms and sinking lava, but sadly the platforms suddenly fall faster than the lava! Last room there is is a big green door leading to Bowser himself.

Bowser will spit fireballs at Mario, and then he'll see the fiery behemoth. Mario has to hit the switch at the other side of Bowser to save... Kamek? Kamek will then make Bowser grow, but to his astonishment, Bowser grows too much. He spits fireballs at the plumber and breaks the walls (or obstacles). Eventually, after hopping on countless numbers of floating platforms, Mario will see a big switch at the end of the room, with Peach above. Mario hits it, causing the lava to sink, along with Bowser. Peach falls down, and they go outside.

Two balloons come, one with Luigi and the other with Blue Toad and Yellow Toad. Luigi offers Mario and Peach a ride, but they leave him behind. Then, the Toads let him go in their balloon and they rode off. Peach asks Mario if she told him about the secret world and Mario shrugged. After the credits, the scene goes to Bowser, where all the Koopalings (except for Larry and Lemmy) try to flip the shrunken Bowser and succeed. Then, the vibrations of that make Bowser's Castle fall down on the Koopa family (apparently).

Enemies Introduced

 * Para-bombs
 * Bulbers
 * Jellybeams
 * Firebars
 * Cannonballs