Phoenix Wright: Ace Attorney Justice For All Cheats

Similar to Gyakuten Saiban: Yomigaeru Gyakuten, if you insert Gyakuten Saiban 2 (GBA) in the GBA slot when you turn on "Gyakuten Saiban 2 (DS)" you can unlock all four cases and start on which ever one you want.

In Officer Marshal's office, if you spray the blod finder thing on the top of the cactus, there will be blood, same with the floor in Edgeworth's room.

During the Maximillian Galactica case, you will hear a clown’s testimony. Amongst his testimony is an edited version of the Fresh Prince of Bel Air theme song from the television show.