Walk to the right and fire a star when you reach the raised ground just before the two platforms with the conveyors. That should take care of the ball-like Ohagi enemy that will come walking toward you from beneath the platforms and give you a complimentary Pink Medicine at the same time. Grab the Pink Medicine as well as the Orange Medicine on the small platform to the right and stay there for a bit. By the way, get used to seeing Ohagi - they are the key recurring enemies that come in many different variations and have fairly good intelligence.
Two more Ohagi enemies will come from the right. Shoot them, drop to the ground, and toss another star ahead to clear the group of Ohagi enemies that will appear further on. Keep throwing stars at them or just jump over them, but continue on and you'll see a tube ahead and a ledge sticking out of the wall. You can head down the tube if you want but the special item for the stage is up there.
In order to get up there, you have to throw a star against the low wall facing that ledge. The easiest way to do this is to stand on the edge facing the low wall, bounce a star down there and jump when it bounces upward toward the ledge. Hopefully, you'll be on top of it and then you can make it to the ledge from there. When you do get up there, jump up to the left and you should reach the Hidden Item Stage.
There will be a series of fairly small platforms leading to the left. There will be two tough looking jumps ahead but you can make it if you jump at the right time, which is close to the edge as possible. After that, there will be a long series of moving platforms. It should be pretty easy from this point, just make sure that you time your jumps so that you don't fall off. Grab the special item ahead for some big points. An experienced player can also bypass the floating platforms by using a well-timed star jump at the beginning of the stage.
Head back down and go through the tube on the far right. Walk to the left and slide down and do a hop over the hole. Stop yourself from sliding down the second slope if you can and wait for the Ohagi to come to you. If you couldn't stop yourself from sliding, just jump when you reach the bottom of the slope to jump over the hole and the Ohagi. Continue jumping up the slope ahead to avoid the cannonballs.
When you see the small cannon ahead, jump over the cannonballs that shoots out until you reach the spot where they initially fall. Wait there until another cannonball shoots out and quickly jump into the tube on the left. The tube will drop you right onto another slope over two pits. Quickly jump left to grab the fireball item on the small ledge and slide and jump when you reach the bottom to fly over the pits.
Beat the Worm enemy on the platform if you want but slide down the slope afterwards and jump to stop once you're under the platform on the right. Inch forward to make the first bomb fall and then stand at the edge of the pit and move left/right to make the second bomb fall. Now jump up the slope and land on the flat part at the top if you can and then slide down and jump before you fall into the pit.
You can make it to the platform where the small cannon is sitting and then push it off the side. Otherwise, carefully jump under the platform and make your way into the pipe ahead. Continue through the pipe and in the next room you'll be on a moving platform over a whole lot of spikes. Jump before the platform reaches the middle of spike bed though or you'll find yourself more "holey".
Head up the tube and quickly walk up the slope above the tube to avoid the Ohagi coming at you. Hit the worm and then slide down the slope onto one of the platforms. When you're going down the slope you should press back once you get off of it otherwise you'll fall onto the spikes. Once you're safe though, head into the tube above. The Ohagi in the next room is trouble here.
Wait to see what it's going to do and keep a star charged just in case. Most of the time it will just fall off of one of the small platforms but occasionally it will bump into you. The Orange Medicine on the right is tough to reach but you'll need it sometime in the future. After that, make your way to the tube and continue on. You'll be above ground again with a few tough spots but you should look on the bright side, since you're almost done this level.
Walk forward a bit and jump when the window opens in the two brick towers ahead and a electrode Ohagi enemy falls out. You can jump onto them when they are not electrified and hit them with a star. Continue to the left and start jumping across the small platforms ahead. Keep charging a star while you're jumping since more Ohagi enemies will start jumping across towards you.
When they are on the platform next to you, jump up and toss a star at it to clear the way. Keep doing that until you're all the way across. A last resort would be to jump onto the Ohagi but that can be tough. Just try to hit it instead. The last two platforms are larger so you shouldn't have any problems at this point. The boss is right ahead so get ready to rumble.
BOSS: Kyodai Ohagi (巨大おはぎ?)[edit]
This large “Ohagi” from the girl's toy box is said to be the one that produced all the other Ohagi mooks in this world. While that sounds intimidating, the actual fight is relatively simple. Kyodai Ohagi will likely get in a cheap hit at the beginning when it starts generating and tossing Ohagi enemies toward you. The first barrage can be avoided with some luck and skillful moves, but you should be able to defeat the boss before it can throw some more at you and make things hectic. Stay on the right and bounce stars off the ground so that it goes over the first hole and slides into the boss. Three hits and it will be down for the count.