Push L1 + L2 + R1 + R2 + Start + Select while playing the game.
Skip intermission sequences:
After pausing the game during an intermission sequence, then push Square to skip the current scene.
During a battle, push L1 during your characters turn and a plate will appear. Choose your desired dress and push Action to activate it. For Yuna, once you get the Special Dress, you can use it during battle. During Yuna's turn, push L1 then R1 to the change to the Special Dress.
Story level 2 - Easy money:
Easily Pay Off Oaka:
To easily pay of oaka's dept, you can go to guadosalam in chapter two from time to time to see if the guy in the inn to the right has any data. before you ask the guy behind the counter in the inn, save at the save sphere and then ask the guy at the counter in the inn. then ask and pay for the data. if he tells you the data is "it's the last person you'd expect" then he is talking about himself. press the square button in front of him and he will pay 100,000 gil. the exact amount you need to pay oaka.
Clear off O'aka's debts by buying 100,000 gil worth of items from him on the airship. After you have cleared the debt, O'aka will start selling you items very cheap. Buy 99 of the items he sells, then fly to another location and sell them at over twice what you bought them for. For example, buy 99 High Potions from him for 50 gil each (total cost of 4950 gil). Then, fly to the Calm Lands and sell the High Potions for 125 gil each, for a total of 12375 gil. That is a quick profit of 7425 gil.
Finish the game to unlock the "New Game+" bonus at the main menu. Select this option to start a new game with all characters keeping the items that were obtained during your first game.
Chapter 5: Defeating Behemoth:
Cast Auto-Reflect, so that the Thunder that Behemoth casts will hurt itself. Note: You may need a White Mage to dispel his Mighty Guard.
When facing Anima in Chapter 5, all he does is attack and Pain. If you cannot defeat him by healing and hacking, level up and try again.
Use a highly advanced special Dress Sphere and heal when he counts down for the big attack. Note: This will be a long battle.
Special Sphere locations:
You do not need these to enter the Den of Woe, but they give more details on the lives of Nooj, Paine, Gippal, and Baralai.
Nooj's Sphere: Chapter 5, Mushroom Rock. Note: This only happens if you gave the "Stolen Sphere" to the Youth League. Speak to Yaibal and accept the task to help Youth League members blow off some steam. Afterwards, go back to Mushroom Rock and proceed to Youth League headquarters. You can now go inside the headquarters. Lucil is on a balcony around the back. Speak to her and she will give you Noojie Woojie's sphere.
Baralai's Sphere: Chapter 5: Guadosalam. After the "Episode Complete", return to Guadosalam. Find Trommell beside the door that has been locked throughout the entire game. Look for the treasure chest to get Baralai's sphere. Go back to the Celsius and ask Shinra if you can view it.
Gippal's Sphere: This sphere is difficult to obtain. You must make Rin the culprit in The Mi'ihen Mystery (Chapters 4/5). He will give you Gippal's sphere in Chapter 5.
Paine's Sphere: Chapter 5: In the Farplane. After you have made your way through the holes and played the organs and before you fight Vegnagun, you will reunite with Gippal. He hands Paine the sphere she left in her recorder. You get the chance to watch it then, and do not have to go back to the Celsius.