Youkai Dochuuki/Stage 3

Arcade
Just like the previous stage, you start this stage just outside of a shop. It's guarded by bouncing zombies that take two shots to kill, and some moths. Go shopping if you need to, but do your best to leave with no less than 30,000 in money. Purchase vitality if you need to, and offense if you can afford to. Be sure to purchase the Kappa's foot if you haven't already, as the boost in swim speed will help tremendously in this stage. From the shop, run to the right, shooting the zombies and dashing under any moths and the bouncing snake. Jump right into the water, and start swimming. Jump up to collect any money bags, but watch out for the falling frogs from above. Try to time your approach to the giant water demon heads so that you can jump over them when they sink. Back on dry land, run to the right as more background and face demons appear and attack. You may even be followed by a hell wheel. If you see one appear, stop immediately and turn around to deal with it by charging up your ki and shooting it three times. After running to the right, you will encounter a set of stairs. To determine which path to follow, examine your money. If you already above 30,000, or within 5000 of reaching it, take the lower path to the water. If you are well below 30,000, you're going to need to accumulate that much in order to complete the stage. The upper path is much more difficult, but it will provide you with plenty of opportunity to collect the money you need.

Jump up the stairs. Jump over or shoot any zombies that get in your way, and run straight right to the water. As you do, it's very likely that face demons and hell wheels will gather to follow behind you. Swim across as quickly as you can, avoiding any water demons along the way. When you reach the opposite end of the water, a red demon with a bow will be waiting to shoot at you. In addition a group of mini-demons will be bouncing around, and many floating demons are likely to be following you from behind. Clear the demons out ahead of you to make space to deal with the demons floating behind you. As you walk further to the right, you will find a green demon with a single horn who will try to jump on to you and cling to you. While he does this, he drains your money away. You must shake the joystick left and right to get him off of you, and shoot him twice to knock him down. It's difficult to reach the set of platforms that lead further up without many threats following you. Clear the area as best as possible before you tackle the platforms. Anything can knock you down to the floor if you're unlucky. Jump back and forth from one platform to the next until you reach the top. Then run to the right, watch out for another bow and arrow demon, and jump up the steps as a skeleton attacks. When you reach the ledge, you can try to jump over to the small ledge where a 500 money bag is, and then on to a cloud where you can reach a silvery platform that contains a 5000 money tile. It's very difficult to accomplish all of these jumps, and you're probably better off just falling down to the bottom and heading to the left. You will fall down to an area that is occupied by small versions of the first and second bosses. There are two red Onis and one Blue Oni on the right. They aren't accompanied by any servants, but they do shoot fireballs at you. Charge up one ki shot and shoot it to remove both red Onis. They will each leave a 5000 money tile behind. The blue Oni is much harder to kill as it takes more shots to defeat, but it leaves a 10,000 money tile behind. Hopefully, you will have earned enough money to reach 30,000. As soon as you do, you can leave the area by walking through the cave below the blue Oni, and falling down to the lower path.
 * Top path

By comparison, the bottom path is less dangerous, though it's still quite challenging. From the stairs, stay down and follow the path to the right. Shoot or dash under any jumping zombies that you encounter on your way to the water. Swim across the short stream, and climb up the steps of the bridge. Ignore the first two money bags, but collect the third and dive into the water. This is where possession of the Kappa feet really helps. To swim better, tap the jump button while holding the joystick in the direction you want to swim, including up and down. Swim down to the bottom, and swim along the small tunnel. You will encounter small sea demons swimming around. You're also likely to be chased by a Hell Wheel from behind. Tap jump and fire simultaneously to remove the small demons from your path while you swim as fast as possible. You'll find some money bags along the way, which you can collect if you need to, but don't slow yourself down or go out of your way. You'll reach a set of steps and have to climb out of the water and take a short trip on land full of zombies, background demons and face demons. You will walk under the chute that arrives from the top path.
 * Bottom path

From where the top and bottom paths rejoin, continue to the right, jump up the steps and dive into the water. After only swimming a short distance, you will find a hole in the ground leading further below. If you still haven't collected 30,000, you can stay above the hole and swim to the right. After passing a few 500 money bags, you'll find a 5000 money tile on the floor of a dead-end. You'll be forced to turn around and swim back to the hole. At the hole, swim down to the bottom and continue swimming to the right. An eel or two will swim by. Keep swimming right until you get close to three blue sea demons swimming above a turtle. They will offer to sell the turtle to you for 30,000. If you do not have that much money, or refuse to buy it, they will swim away. If you continue swimming to the right, you will encounter what appears to be the boss of the stage, a large green merman demon. But if you defeat him, he will simply drop a 1000 money bag and leave you stranded in a dead-end. To get the turtle sellers back, swim back up and down the hole and return to their original location. Agree to buy the turtle for 30,000.

By liberating the turtle from the sea demons, the turtle will reward your kindness by taking you out of the stage, and into the Dragon Palace under the ocean. While you are there, you will be treated to a show of dancing mermaids. Tarosuke will appear to be very pleased by the show. When it ends, the queen of the palace will offer you a present: Pandora's Box. You carry it with you as the turtle swims you out of the palace and to the end of the stage. When you arrive at your destination, the turtle will ask if you'd like to open the box. You have the option to refuse, and he will ask you again, up to two more times. If you open the box, you will always earn 10,000 in money, but there's also a very good chance that you will be turned into an old man, incapable of moving quickly until you purchase the Tennyo no Fun, or Angel Poo, from the shop for the same 10,000. There is a chance that you will not turn into an old man, and there is a secret to avoiding the curse every time: only answer yes the third time you are asked to open the box.

PC Engine
The third stage of the game is subtitled Yūkai (lit. "Ghost Sea"), and begins with a Green Zako walking towards Tarosuke just before the third instance of Zakka's shop. Once again, you may want to buy the Yokai Jiru and Jigoku Don to restore some of your energy if you are running low, but the next level of Rensha will increase Tarosuke's firepower even further.

Once you have left the shop, continue to the right until you see two Namekemono jumping around (which will not leave any form of money bag behind when killed), and a 500 money bag just before a long pool of water inhabited by both sizes of Mizu. Several Kao will also be floating around in mid-air as you make your way over, and there are two Gaikotsu and a Gray Snake to contend with once you have made it to the other side (the latter of which will leave a 200 money bag behind when killed). You will also see three 500 money bags embedded in the stone wall just before another long pool of water - this one has four more 500 money bags for you to collect as you make your way over. Once you have made it to the other side, you will have deal with several Mini Oni (which will each leave a 100 money bag behind when killed) just before two smaller versions of the Red Oni seen at the end of the first stage and a new, medium-sized turquoise version blocking your path. They spit fire at Tarosuke and take quite a few hits to defeat, but they will each leave a 5000 money block behind when killed. Once all three have been defeated, Tarosuke will proceed to the second part of the stage.

The second part of the stage begins with four Namekemono jumping around near Tarosuke. Stand in a position where you know they won't land on you before killing them, then jump up to the top of the upward staircase and enter the deep body of water. You will now have to contend with three Umi Demons (which will each leave a 200 money bag behind when killed) before dropping down off the edge of the sea floor and collecting two 500 money bags.

You are now at the entrance to the Mermaids' Dance Hall. The turtle at the torii gate will ask Tarosuke if he wants to see the show, and you must answer "yes" or "no". If your answer is "yes", it will cost you 30000 in money; if you do not have enough money, the turtle will turn you away. Once the show is over, Tarosuke will be given a box by the lead mermaid; if you decide to open it, you will either get 10000 in money or be turned into an old man until you buy a Tennyo no Unko from Zakka's shop on the next stage - Sabaki no Tani (lit. "Valley of Judgment").