Go to the dictionary and look up the word "cheat". Touch the "V" next to the verb to open the conjugation chart. Hold the L and R triggers for a few seconds. If done correctly, you will hear the word "cheat" in Japanese. The cheat has now been activated. Now to use the cheat, you must return to the main menu, go to Options, then Sound. Pressing R will advance you 1 lesson, and pressing L will advance you to the beginning of the next lesson group (usually every 50 lessons).