Debugging is only really there for Bandai's use. Of course, someone had to find out how to do it and now it has become a fun little activity for people to engage in... If you debug you can get access to all the characters, choose if you want a boy or girl, get access to some undeveloped characters and characters that did not end up getting used. You will also be able to play with your tama at hyper speed. The disdvantage is that it is difficult to reverse and may end up damaging your tamagotchi so badly that you will no longer be able to play with it... You decide!