World 6-4 (New Super Mario Bros. 2)

World 6-4 is the one of the only levels in the game which is ghost based, without being a Ghost house, the other level being. This level focalises on Peepas, which move platforms by shaking them.

Star Coins

 * Star Coin 1: As soon the level starts, head left to get the first coin.
 * Star Coin 2: Once Mario or Luigi see the first spinning Brick Block, jump on top to reveal a hidden block with a Beanstalk. Climb it, then time your jumps over the stone blocks correctly to get the second coin.
 * Star Coin 3: The third coin is being circled by Peepas towards the end of the level. He or she must wall kick to get the star coin.

Enemies

 * Peepas
 * Crowbers
 * Boos