World 6-Tower (New Super Mario Bros. Wii)
From the Super Mario Wiki
This tower contains two giant Skewers on the floor and ceiling of the tower. They both collide in the middle of the level. There are also some Pipe Cannons and moving platforms that the player has to use to advance.
The player faces Morton Koopa Jr. at the very top in an arena filled with lava on either side. During the fight, Morton jumps and ground pounds (stunning any players not in the air when he lands). He also shoot pink blasts from his wand (Morton's casting speed is slow but the blasts are fast). Morton also spin in his shell fast when hit. The attack can easily be avoided if players are on the raised ground on either side. However they must avoid Skewers that hit the ground. Morton is defeated once he is hit the third time.