World 4-2 (New Super Mario Bros. 2)
From the Super Mario Wiki, the Mario encyclopedia
World 4-2 is the second level of World 4 in New Super Mario Bros. 2. It is an icy level which is heavily occupied by many Christmas-like trees that expand with colorful decorations. The level has many Koopa Troopas that patrol the foreground and Piranha Plants which attack from the Warp Pipes scattered throughout the course.
Mario begins in front of several Koopa Troopas and ? Blocks, one of them with a Fire Flower in it, A Warp Pipe with a Piranha Plant can be found, followed by more Koopas. A multi-coin Brick Block can be found here. Following this is a very tall pipe with a Piranha Plant. More Koopas can be found on a hilly area. Another tall pipe can be found, followed by more Koopas and more Piranha Plants along the way. Following that is a Coin Roulette Block. More pipes with Piranha Plants as well as Koopas can be found right after. Not far away is the Checkpoint Flag, where Mario can find a Fire Flower in one of the ? Blocks in between. More Piranhas and Koopas follow, along with more pipes. Shortly after, a Gold Ring can be found. Collecting this turns all enemies gold. In this state, if Mario uses a Koopa to attack the Piranha Plants in the pipes, the pipes spit out coins. After a few more Koopas and Piranha Plants, the Goal Pole is found.