Upon completion of the Tail Cave you’ll find yourself back outside of the entrance, from there you’ll want to take a walk back into Mabe Village where you’ll be greeted by the two boys that were playing a game informing you that something has happened to BowWow.
Locating and Rescuing BowWow
Head over to Madame MeowMeow’s house and talk to her and she’ll ask you to locate and collect her beloved BowWow from the nasty kidnappers. To begin your search for the BowWow you’ll need to head into the Mysterious Forest and head out of the east exit into Koholint Prairie, use the now gained jump ability from Roc’s Feather to hop over the holes and collect a Piece of Heart.
From where you collected the Piece of Heart hop over the holes again to the north and follow the path around to the Moblin’s House, but before entering continue following the path around and head south through the Tabahl Wasteland and continue down until you reach the Cemetery.
Once you’ve entered the Cemetery head to the southeast part where you’ll find some gravestones, push the bottom right one forward to find a secret staircase, head down it and push the stone to the right which will allow you to jump diagonally to the small platform that will allow you to hop over to another Piece of Heart.
Exit the secret room and head back up to the Moblin’s House and enter it, kill the enemy inside the first room and proceed into the next room where you’ll have a few Moblin’s throwing spears at you. Here you’ll want to keep you Shield up at all times and go in for some swipes with your Sword when you see an opening.
Once you’ve dealt with those enemies, head into the next room where you’ll face the King Moblin. In order to defeat him you’ll need to wait for him to charge at you and hit the wall which will give you an opportunity to get a couple of hits on him, repeat this until he is slain.
All that’s left to do here is enter the next room and retrieve BowWow, and then exit the Moblin’s House where you’ll be greeted by the Owl. After you’ve listened to what the Owl has to say head over to the sign to the right and speak with Dampe, now head back down through the Cemetery and exit out of the west side.
Finding a path to Bottle Grotto
Now make your way back through the Mysterious Forest and follow the path west until you see another path allowing you to head north towards Goponga Swamp. Head up and enter the Telephone Booth and interact with the phone inside.
Once you’ve listened to Ulrira exit the Telephone Booth and head into the swamp, follow the path around whilst dodging any fish on your way through, you’ll see a Chest with a large flower blocking your path to it, let BowWow defeat it and open the Chest for 50 Rupees. Continue to the end of the Swamp and enter Bottle Grotto.