Final Fantasy X-2

From the start of the game, use Pilfer Gil to get as much money as possible and try not to buy any items/accessories. Rescue O'aka from the Al Bhed in Macalania Woods (Ch. 1) and corner him in the southeast section of Macalania. Agree to help him and pay off his debt by the end of Chapter 2 (100,000 gil!). When the debt is paid off, he'll have items at a cost cheaper than what you can sell them for. Buy 99 of each item he has (Potion, Hi-Potion, Phoenix Down, Antidote, Eye Drops, Echo Screen, Soft, and Holy Water) and sell all of it to the Gullstore just across from O'aka. Repeat for as much money as you want; each time you buy and sell items you'll profit 16,830 gil.

Previous weapons from the Final Fantasy 10 can be seen used by the characters in certain Dresspheres:

Brotherhood (Tidus): Yuna uses it when set to Warrior Dressphere.
Rod (Yuna): Set Yuna to White Mage Dressphere.
Long Sword (Auron): Set Yuna to Samurai Dressphere.
Caladbolg (Tidus): Set Yuna to Dark Knight Dressphere.
Masamune (Auron): Set Rikku to Dark Knight Dressphere.
World Champion (Wakka): Used by Tidus when he uses the Terra Of Zanarkand ability at the final battle.

Use Yuna and Paine as Warriors and Rikku as a Thief. Also get Yuna to use a hidden dress called Healer, which works better than White Mage. As you get further in the game, there will be more new dresses. Do not use any of them. Although some of them may seem strong, they are all all pretty much useless. Get Paine something with Pierce and keep hacking at your enemies while Yuna heals when needed. Have Rikku steal from whoever you see. You will be surprised at what you can get from just stealing from a Ghost or some sort of a strong monster. To complete this game, you will need to be at around level 50 to 60. You should have mastered a few jobs along the way. Have Yuna master White Mage and Item Shooter if possible. Get Paine to master Black Mage and Dark Knight if possible. You should get Rikku to Master Berserker. Making Yuna master those two specific jobs will make her an ultimate healer. She will heal very well. If you are really into the game, you could have her master the Trainer job if you would like her as an attacker as well. Having Paine master Black Mage and Dark Knight will make her a major attacker. Also, after mastering Dark Knight she gets an ability that will allow her to use all learned Black Magic. Having Rikku master Berserker will use her speed to a major advantage. Berserker gains counter abilities. Once mastered, you will be able to counter attacks, missed attacks, and magic attacks. Berserker is also a very powerful attacker and is very fast. The ATB bar for that particular job is small, which will allow you to attack many times. All this combines for a very powerful team. The only downfall to this is Yuna's lack of HP, because of the healing jobs. Use your more powerful characters to protect her whenever possible and keep a good amount of Phoenix Downs available.

Press L1 + L2 + R1 + R2 + Start + Select during game play.

To instantly buy all of the soundtracks of the game you must start a new game. After you have completed the mission on Mt. Gagazet, do not go to the missions on Besaid Island or the Zanarkand Ruins, go straight to Luca. Complete the mission there, then go back. Go to the Sphere Theatre and you should be able to buy the music and movie spheres with whatever money you have.

Movie Spheres - 2,000 Gil
Music Spheres - 1,000 Gil

In Chapter 3, go to Luca and win the Sphere Break Tournament. You will receive the Lady Luck Dressphere, which has the Double EXP auto-ability.

Get into an easy battle, and then eliminate all but one enemy. Turn all your characters into White Mages, and tape down the X button. At that point, you can leave, and any damage inflicted from your enemy will be counteracted with the prayers. Note: Works best on "Fast Battle Speed" configuration, and on enemies without status altering abilities.

In chapter one after the floating ruins mission, go to the albhed shop that comes after the macalania woods. O'aka will be there and run into the forest. Follow him until he reaches the forest entrance. He has gone into the right path, follow him. On the next map go to the upper area, Paine will say something like "I guess he thinks we can't see him" go to the left corner and hit the X button. The screen will change to O'aka and then you can choose whether or not to turn him in to the al bhed. allow him to board your airship and pay off his debt(it should be either 1000 or 100 000 gil). When you do he will sell his items at ridiculously cheap prices. Buy as many of his items as possible and then sell them at the gullstore.

Later in Chapter 2 for a easy 90k(must have 10k to do) gil go to guadosalam. Find the innkeeper(buidling closest to entrance) and ask about the data(save it first!). He will sell his data for 10k and give you a hint about where to find the person that wants the data. Unless he says "it's the person you'd least expect" or "the person closest to you", restart the game(that's why I said save it). Depending on how lucky you are you might get it soon. But when he says one of the two hints, hit [] to sell the data, he will buy it for a cool 100k. so minus the 10k to buy the data, you just made a cool 90 000 gil!

Don't waste your gil at the Luca Theater. If you really have to see the Movies or hear the Music, save your game first. Then go to the Theater and buy all the spheres you want. When you're ready to continue playing, just reload your game.

After beating the game for the first time,on the title screen there will be new game+.This is a new game except your characters start with the items when you ended the game for the first time.