After you gain the Master Sword and become adult Link, go to the lost woods and take a left to the skull kid. He will attack you because you are now an adult, so attack back with regular sword attack. Do not use anything strong and dodge his attacks, if you die or use any strong attacks, he will backflip out of there. Once defeated, he will leave a very large red rupee behind, which is bigger in width and height then Link in his adulthood.
Stand infront of one of thoes "one eyed stones" that tell the time when you hit them. Play any non-teliporting song for two free faeries.
For this glitch you will need an empty bottle and a bottle with fish (or bugs) in it. Set both the empty bottle and bottle with fish to any direction (for an example we'll be using Down and Right). Now you need to backflip and, BEFORE you land, press Right and Down. Link should drink out of the bottle as if it were Lon Lon Milk and receive some hearts. This can be done at any time.
When you are a child, go to the fishing pond and start fishing like normal. Keep fishing until you get a fish that’s big enough to earn a heart piece. Instead of going to the fishing owner, go into the middle of the pond. Face towards the owner in the water and hold Z + L (lock and shield). Don’t let go and swim and run to him. Once you reach him, talk to him without letting go of Z and L. He’ll give you the golden scale instead of a heart piece!
This allows you to do many things early on. Such as entering Zora’s Domain without having to play Zelda’s Lullaby. Or getting the heart piece from the Lakeside Laboratory (letting you have both the scale and heart piece.)
If you look at the broach that Malon is wearing, you will notice that it is actually Bowser's face.