The first Star Coin is located below the walkway at Point 1. Stomp a nearby Bob-omb and use it to blast a hole in the walkway, then throw a second Bob-omb at the Star Coin to collect it.
Hit the Invisible Block at Point 2, then climb the revealed Beanstalk to find a hidden area.
When you reach the top of the Beanstalk, locate the Invisible Block above the steps to the right. Collect the Super Star, then dash through the nearby enemies to gain an extra life.
The second Star Coin is located between the conveyor belts at Point 3. When you collect it, watch out for the Bone Goombas that drop down from the pipes above you.
When you reach Point 4, jump up and hit the switch above you. This causes the nearby conveyor belts to change direction. Drop to the first belt and crouch down.
Allow the conveyor belts to carry you under the spikes and into the enclosure. Slip past the balls as they bounce around the area, then grab the Star Coin near the wall to the right.
This battle takes place on a conveyor belt, so it’s essential that you keep your footing—especially when Lemmy Koopa uses his wand to summon rubber balls. Rubber balls do not cause damage, but they can make it difficult to move around the room. If a rubber ball keeps knocking you out of position, perform a wall jump and leap over it. As soon as you’re within striking distance, stomp Lemmy’s head.
After you stomp Lemmy, he tucks into his shell and bounces around the room. Avoid the shell as you wait for another chance to attack. The conveyor belt changes direction each time a ball hits the switch on the ceiling, and Lemmy occasionally charges toward you, but this shouldn’t affect your basic strategy. Stomp Lemmy a total of three times to end the encounter.