After visiting the Sunken City and going up waterfalls with Dimitri, you reach Mt. Cucco. With Moosh's help, you reach Dancing Dragon Dungeon.
From the entrance, go north. Push the left middle block to the right and open the chest to get bombs.
Get a Key
Get into the mine cart. Ignore the switch on the way for now. In the room where you end up, bomb the right wall where it's cracked.
Lift one of the middle pots, then lift the pot in the center. Push the rest of the pots onto the switches, and stand on the final one to make a key fall from the ceiling.
Get the Dungeon Map
Go back to the mine cart. Get in, but hit the switch before you pass it. You should be sent to a different room this time.
Swim across the water and push the statue onto the switch. Exit north.
Swim to the northwest corner of the room. Push a middle block toward the stairs, then push the block next to you out of the way. Go down the stairs.
Make your way through the narrow passage, being careful of green wizzrobes on the way. You will pass by an exit on the bottom right of the room, but I recommend going left and using the southwest exit.
Ignore the stairs for now and go east. Open the chest to get the Dungeon Map.
Get a Second Key
Go back to the previous room and find the stairs in the southwest corner. Go down.
Go down the ladder and use the Roc's Feather to jump across the moving platforms. In the next room, platforms appear and disappear. Jump from platform to platform, and try to get on the platforms at the highest level near the ceiling. Make your way to the right and go up the ladder.
You can light the torch with an Ember Seed if you wish, but it only stays lit for a short time.
Push up on the block to the left of the torch. Go to the right and use the Roc's Feather to jump around to where the chest is. It contains a key.
Get the Compass
Go back to the entrance of the dungeon. Unlock the door in the east wall and go through. Jump over the spikes and bomb the cracks in the east wall.
Kill all of the enemies in this room. Be careful of the Stalfos, which will jump into the air and try to land on you. After all of the monsters are gone, push the block to make a chest appear. It contains the compass.
Get a Third Key
Go back to the room with the spikes, then go north. In the water, press B to go underwater when the rollers pass by. Exit north.
Get past the Like Like and Spiny Beetle. Go to the upper part of the room and jump over the cracked tiles to reach the mine cart. Get in.
Hit the switch that the mine cart passes. When you get out, go back into the mine cart. It should take you to a different room.
Kill the Like Likes and Water Tektite to make a key fall from the ceiling. Get into the water and press B where it fell to get the key.
Get a Fourth Key
Go back into the mine cart. When it drops you off, go east. Unlock the key block and continue east. The owl statue just says "Greater speed gives greater distance." In other words, you will need to use Pegasus Seeds while jumping.
Kill all of the Stalfos to make stairs appear next to the owl statue. Go up. Use a Pegasus Seed, then jump over the gaps until you reach the stairs. Go down.
Go to the right and push the block out of the way. Get into the mine cart. When it drops you off, go to the left side of the room and get the key from the chest. There is a business scrub in this room who will sell you Ember Seeds.
Reach the Mini-Boss
Go south from where you got the key. Jump to the gaps in the spikes to reach the south exit.
Wait for Agunima to split into three. Agunima throws fireballs, but they are slow, so they are easy to avoid. Just keep your distance when Agunima is about to throw fireballs. This is important, because you can easily lose a lot of hearts if you are too close to Agunima when he throws fireballs.
Light the torches with Ember Seeds. The Agunima with a shadow is vulnerable, but only while both torches are lit. So the strategy is to wait for Agunima to disappear, light the torches and quickly hit the Agunima with a shadow before it can throw a fireball. You should have enough time to hit Agunima twice after you light the torches. Don't wait too to hit Agunima or you will end up walking right into his fireball attack.
Get the Slingshot
If you go east from Agunima's room, the wise old man will tell you that what you seek is in the eye.
Go back to Agunima's room and go south. Get into the mine cart. When it drops you off, go south.
Avoid the beamos and go through the locked door in the west wall. Push the statue onto the switch. The floor will start collapsing, so use a Pegasus Seed to run to the chest. It contains the Slingshot. You can use any type of seed in the slingshot. This is helpful for lighting torches at a distance and hitting switches from afar.
Get the Boss Key
Go east and exit north from the beamos room. Get into the mine cart. In the next room, use the slingshot to hit both switches on the right. When the mine cart drops you off, go back in. You should end up on the far right side of the room. Go north, then east.
Use pegasus seeds to jump over the gaps. Unlock the key block and go north.
Get into the right "eye" and dive down on the left side to find the Boss Key.
Get a Fifth Key
Go back to the mine cart and get in. Go north through Agunima's room and continue north to the room with the spikes. Jump to the gaps in the spikes and exit to the north.
Get into the mine cart and use the slingshots to shoot ember seeds at the torches. If you hit them all, a chest appears. Get back into the mine cart and return to the room with the spikes. Jump to the gaps in the spikes to go to the east side of the room. Go up the stairs and exit north, then east. Open the chest to get a key.
Reach the Boss
Go back to the room with the spikes, and exit south to Agunima's room again. Go south from there.
In the room with the mine cart, go to the south part of the room. Trigger the blade trap and use the slingshot to hit the switch to the right of the blade trap. Use the Roc's Feather to jump over the trap. Go back into the mine cart.
When the mine cart drops you off, kill the three red wizzrobes to open the north door. Exit north.
Get past the beamos and unlock the key block in the north part of the room. If you don't have a key, go north from Agunima's room and get in the mine cart, then shoot the torches with ember seeds using the slingshot.
After unlocking the key block in the beamos room, go down the stairs.
The owl statue says that the guarded body watches with unguarded eyes. This is a clue to defeating the next boss. Go toward the east side of the room and use the slingshot to shoot ember seeds at the torches. Go across the bridge that appears.
Use the northeast exit in the next room.
Get on the moving platform. It moves quickly. Be sure to kill any keese in your way so they don't knock you off. Unlock the boss door and go in.
Hit Gohma's claw. Sometimes Gohma will charge forward at you, so be prepared to run or jump out of the way. Gohma always raises its claw before charging forward at you, so get out of the way when you see Gohma raise its claw. Gohma can grab you in the claw and pound you into the ground.
Eventually the claw will break off. At this point Gohma will sometimes spit out multicolored bugs that stick to you and prevent you from using items. Kill these. Use the slingshot to hit Gohma's eye when it opens.
Get the Essence
Go east to get the Soothing Rain. Outside, the Maku Tree says that he saw a vision of a lake shaped like eyeglasses.