World 7: Ghost House

Coin 1

Well would you look at that, the coin's right below the start! To get to it, lure the boxing-baddie on the right down the stairs and into the wall, which he'll pummel through, allowing you to grab the coin.

Coin 2

After dropping to the bottom of the long shaft, take the door in the upper-right corner. The large Boo in the next room conceals a coin--lure him aside, then clamber up to the rope and drop from it onto the coin.

Coin 3

Finding the final Star Coin is a multi-step process. First, access the Ghost Houses's hidden route by climbing up the first room, just past the first fake door. You should see a strange wall on the left with a crack in it (just below one of the boxing enemies). Lure the boxing enemy to that wall, which he'll punch his way through, creating an entranceway for you--continue through the door inside. Climb up the subsequent room to the door in the top-left corner to wind up back outside. But wait! Don't head to the flag pole yet, instead head through the ground-floor door, where you'll find the final Star Coin. It can be reached by triggering the nearby P-Switch.

Alternate Route (after checkpoint) This level contains a secret route that will take you right to 7-5, skipping 7-4. Here's how to find it: Inside the first room, climb up just past the first fake door. You should see a strange wall on the left with a crack in it (just below one of the boxing enemies). Lure the boxing enemy to that wall, which he'll punch his way through, creating an entranceway for you--continue through the door inside. Now proceed through the rest of the level to find the secret flag pole.