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Unlockable: All Cases
To unlock all of the cases in the game instantaneously, insert your Gyakuten Saiban (Phoenix Wright in Japan) GBA cartridge into your Nintendo DS GBA slot.

Hint: Unlocking Cases
There are five cases total in this game. To unlock cases, you must successfully complete the case before it. Once a case is unlocked, however, you can go back to it and replay it at any time.

Submitted by Colin Moriarty
Hint: Saving
Remember that you don't have to wait until the end of a sequence (such as an investigation sequence or a part of a trial) to save your game. You can save your game, quite literally, at any time by simply pressing the Start button. This will bring you to the menu where your game can be saved. After saving, you'll be brought back to the start menu.

Addition by Mykas0:

This is a useful technique if you're playing without a FAQ or guide and don't know how to proceed with a certain case. If you know you're about to make a choice, present a piece of evidence, or are about to object to something with uncertainty, save your game. Then, proceed with the case. If the choice you made happened to be wrong, you can simply restart from your previous save and try again.

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