When in shop hold L and R then press a, a, x, x, b, a, b after that go to class and once done come back and check your money you will have more then before (NOTE: if you hurry the cheat wont work and it will never work if it doesn't work the first time.to get best results do everything slow but the cheat REMEMBER if you type the cheat slow it won't work for this cheat you will need 50 fingers because thats how fast you have to press it.