debugging allows you to choose your character, gender(?) and allows you to go into hyper speed. BUT, it has been able to break a couple of tamagotchis in the past.
We'v had a lot of topics about debugging, so it should be no problem finding out about it. Basically,( I don't know how to do it) you need a kind of tamagotchi to do it. You do a special series of rubbing e.t.c. and reset your tama and thus you should be able to pick what characters you want to raise.
you take apart your tama and with a pencil lightly scribble out "debug" and put it back together and i think u restart it after that then u should be able to choose the character. I hope that helps!
Why don't you try visiting Natasja's site (member of TamaTalk & TamaGuide)?
It has a wide variety of information about the different types of Tamagotchis (old & new) - and a section on how to Debug/Tama Surgery! Her site is called Pixelmood