Legend of Zelda: The Wind Waker

Ok this is a weird cheat. You need the hookshot and your sword. Find a boka baba and hookshot it then immediately take out your sword and do a jump attack. If done properly, the boka baba will still be alive and you can't target it and any attacks it does to you will be affective and take the same amount of damage. (hint: I've only done it in that forest temple, I'm not sure it works anywhere else. You can try it, but it may not work)

Go out and find any Shop Ship. Pull out a bomb and place it on the ship then get away from it. The blast will rock the boat and cause smoke to appear from it.

To use bombs inside houses and buildings, or any place that you normally cannot use them, set the Tingle Tuner to Y. The quickly press Y then start/pause right after (you have to do it so fast that he doesn't take out the tingle tuner yet). Then while on the inventory screen, set bombs to Y. Then unpause the game and Link should hold a bomb over his head and a message will appear that says you can only call Tingle in places that have maps. Quickly press A or the bomb will blow up on you. Now you can move around with a bomb.

Medli will give you your first bottle before entering the Dragon Roost Cavern.

After defeating Dragon Roost Cavern, go to section E6 and find a submarine. Defeat all the monsters inside to claim your prize.

When you get a letter from Beedle about a sale, go to section C2. Look for his ship. He will sell you a bottle for 500 rupees. You can also buy a heart piece and map there.

Go to Windfall Island at night. Talk to the girl next to Zunari's shop. She will tell you to go away. Do so and she will start to run. Follow her at a safe distance. When she stops, find somewhere to hide. At the end of her run, she will try to open a chest. Creep up on her. If done correctly, she will ask you some questions. Answer them all with the first choice.

When you defeat an enemy over a bottomless pit, look down into the pit. You should be able to see what it dropped. Use the telescope if you cannot see it.

Speak to the schoolteacher, Ms. Marie. She will tell you a story about the boys that do not want to attend her class. Speak to the four boys outside (a.k.a. the Killer Bees). Agree to play their game of hide 'n' seek. After catching all of them, they will give you a Heart Piece. After you play their game, talk to the schoolteacher. She will tell you of her obsession with jewelry. Give her twenty Joy Pendants and she will give you her Cabana Deed.

If you change your GameCube's internal clock to daytime, the background at the save screen will show a blue sky. If you change it to night it will show a sky full of stars. Hold A then turn on your Cube to change the calendar setting.

When traveling around the Great Sea at night, stop the boat and look into the sky. You should be able to see unusually bright stars that resemble constellations such as The Big Dipper and Orion's Belt.

When visiting Dragon Roost Island For the first time, do everything up until you get to toss Medli to the other side of the spring. Miss throwing her and make her hit a wall. Stars will appear like when you place a high bid in the auctions, and she will say "Link, I didn't know you were triplets" or something to that effect. This will not affect your adventure in any way if you toss her correctly the next time on the inclined rock facing, and the wind is blowing north.

Equip the Hookshot and target the tip of the purple tentacle. Once you grab the tentacle, slice it with your sword. Get back before it closes up on you and continue to Hookshot the tentacle and attack it with your sword until it dies.