As soon as the level starts you need to quickly ascend the the train and snag Green Star #1 . Hop back down and you can pick up a Cannon Box then jump back on the next car. Flopters will drop in from above, but the nearby ? Block has a Super Leaf that lets you easily jump on their heads. Continue right where the Cat Bullet Bills will seek towards you, easily jumped over. Ahead is a Goomba Tower with Green Star #2 atop, just shoot them with the Cannon Box or swipe them with the Tanooki Suit tail or use the Cat Bullet Bills to chop down the tower.
Crates are on the next car and blowing them up will reveal a Mega Mushroom which is useful for racking up points while not taking any damage. Enter the pipe to find Captain Toad in a crate on the far train, freeing him rewards Green Star #3 . Cross back over to the Bullet Bill Express where two Fire Bros. guard the lead car. Take them out and claim the Stamp from the lower portion of this car before using the pipe.
Boss: Pom Pom
Pom Pom wields a ninja star that she’ll throw around at you, but it’s not hard to dodge a single ninja star. That’s the trick though, Pom Pom will disperse into multiple copies – three, four, then six – and you need to find the real one. The real Pom Pom is easily indentified by her green hair bow and pink ninja star, jump on that one before it gets hectic.
Enter the Warp Box and snag the Green +Clock on the way to the Goal Pole.