Yep, you heard right. You actually can enter the castle.
But, it takes a Gameshark to do it.
Turn on the Levitate cheat then go to Zelda's courtyard.
Then, simply fly above zelda into the room where she looks, which means flying above the castle roof. There, you can ctually stand a distance in her castle. This is the only spot in the courtyard that allows you to stand in her castle.

It's meaningless, but interesting.

A way to get more bottles is to go somewhere you can catch a fish or something. Take out a bottle and try to catch the thing, but about a little less than halfway through your swing, pause the game and replace the bottle with an item you don't need.(NOTE: After you do this do NOT save or you won't be able to get your item back unless it is a collectible item like deku nuts or arrows. If you want to keep it, use the claim check after you get Biggeron's sword.

The Treasure Chest game (that opens at night in the Hyrule Castle Town Market) can be finished easily without luck of guess. Equip the Lens of Truth. You can use it to see inside the chests and look for which chests contain Rupees and which chests contain the keys needed to progress. In this way you can get to the Piece of Heart at the end without ever having to retry.

The only downside to this trick is that you have to wait until later on in the game to perform it.

Ok so when you are young link go to the place where zelda is at the window and don't go to her go to the window on the right and look in it there are pictures of mario charachters and if you slingshot that window youll get a red ruppe (20)

Once you get to the part where the big gorron says he will make you the sword do the song where the day and night passes a couple times and you will get your big gorron sword faster.

When you are walking repetedly press the z button and link walkes weird.

You can have more bottles than you think
So heres my cheat

Equip bottle
Got to catch bug or fish

Use bottle for capture and pause game when link swings it
And replace with different item and ta the extra bottle

To do the Jump Glitch, you must be at least adult Link. Go to Lake Hylia and go to the house with the old lady inside, go to the very end of the wood out on the water. In the corner, jump straight to the platform and hold up. If you were in the right spot, and you went the correct way, you should grab on to it, fall off it, grab on to it again, and so on so quickly that he will do it 7 times a second if you hold up. You will keep on going if you hold up. For the Earthquake Glitch, you must be kid Link at his house. At that desk at the bottom(if you have the full house view)go to it and put it so you can't see the whole house. If your view is just right, go to the right of it. Then get to it's corner and if yo went into it just right, everything should start shaking while Link is moving(the faster he appears to be moving, the faster the shaking is). And while the room is shaking, look at the plate on the desk and if you look at the right spot, you might see a Stalfos' head.

Easy: Get All Heart's in the game, Get Golden scale, get all Great Fariy
Spell's,Use any Bottle Item's,Get All 4 bottle's and Largest Quiver, Seed bag, & Bomb Bag.

Normal: Get 10 Heart's, Get Silver scale, Get 1/2 magic meter, Get 3 Spell item's, use only Red & Green Potion's, Get 2 Bottle's, and 1 upgrade for Quiver, Seed bag, and Bomb bag.

Hard: Keep 3 Heart's, Get silver scale, Only Great Fairy on Death Mountan, Only use Lon-Lon Milk, Get 1 bottle, No Quiver, Seed bag, And Bomb bag Upgrade's, and
Use Iron Boot's, Deku nut's, & Megaton Hammer(Until You Get Sword Back) When
Fighting Ganon.

In the ice cavern as big link go till you see 2 pots beside eachother break 1 and throw the other at the opossite wll and it will go through the wall(note make sure icecicles have fallen on roof) ps: this is my first cheat <(-_-)>

To get the fifth bottle here is what you need to do.

1. Go to a fairy fountain.
2.get out an empty bottle.
3.swing at a fairy and pause before catching.
4.switch to an item you don't need.
5. You now have a fifth bottle containg a fairy.
WARNING: only save if your sure you want to keep the bottle.

There is a secret skulltula area by the tree where you first met talon the lon lon ranch owner. You must be kid link. Go to the closest tree and play the song of storms. Then when you go down find the wall with the skulltula. When you have killed it you must step closer back to the portal. Then use your boomerang to gramb the token but before you get it jump into the portal. Results: you get a token. Repeat this process to get unlimited skulltulas tokens.

When you are little Link, at night, go to the Market and look for a man
Looking out of his window on a balcony. Look for a little white dog and
Touch it. It will follow you around, now go to the Alley, if you don't
Know where that is, go to the corners of the Market, you will eventually
Enter the Alley. Take the dog to an area in the Alley where there are
Two doors. There will be one on the left wall, and one going forward.
Go forward with the dog and talk to the lady in the house. I think
She gives you a heart piece, I don't recall, but also note that when
Walking into the Alley with the dog, go slow and let it keep up with
You or it will stay in the Market. WOOF WOOF!