Legend of Zelda - Ocarina of Time - Master Quest - Platform: Gamecube

Baby Ghoma
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Whenever you see the Baby Ghoma, make sure to take them out 
before they hatch out of their eggs. The slingshot is recommended. 
Some rooms contain ten to fifteen eggs. Get them before they 
become an annoyance.

Multiply bugs
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This trick requires at least one Bottle. First, catch a bug then 
let it go. When released, the bug multiplies into three. 
Take them the "crazy man" who will buy them. Keep repeating this 
until you have enough money. Also, put the bugs into the soft 
spots in the ground.

Zora's Domain: Orange Rupee
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Note: It is recommended that you would get at least the Adult's 
or Giant's Wallet before doing this. In Zora's Domain, go to the 
top of the waterfall as a child and talk to the Zora there. 
Accept the mini-game and he will throw Rupees in the water below. 
Rarely, if you are lucky, he will throw an Orange Rupee worth 500 
Rupees. Keep playing the mini-game at anytime if you want the 
Orange Rupee again.

Pulled through gate
-------------------
In the Water Temple, there is a passageway that leads to a gate 
with a torch, two boxes, and a gold Skulltula behind it. As the 
passageway breaks off in two directions, hookshot the torch while 
the gate is closed. You can be pulled through the gate without 
getting hurt. Unfortunately, there is no way to leave once you 
are here, but you can get the Skulltula.

Jump through wall
-----------------
Go to where Malon is located. When you get the egg from her, there 
should be a vine wall that you can climb up. Get about slightly more 
than three quarters of the way up. Press A to fall, then quickly 
press B while still in the air. You should go through the wall.

Strange grotto
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Note: Use the rumble feature and the Stone Of Agony to find this 
grotto. Go or warp to the Forest Meadow then move near the log 
exit. The controller will rumble. Bomb the middle between the 
entrance to the maze and the exit. The secret grotto will be 
revealed. Do down it. When you do, you will end up in a strange 
grotto with crystal-like walls.