haha.. it's funny how getting the less-healthy characters can sometimes be the most difficult to get!
fight off your parental instincts a bit and perhaps abandon him for a little while everyday?...
or, declare that "punishing" tamagotchi and sending him to timeout is an archaic practice that haults his ability to truly understand right from wrong based on his own beliefs and that tamagotchi must be free to make his own choices...
(a.k.a. become a miserable failure when it comes to training, as i was before i figured the specifics out!) that's how i got my oniotchi
P.S... if you find oniotchi unattractive don't fret, after i mastered the art of the training bar, my oniotchi grew into none other than mimitchi
(he was a second generation, of course, so if you're still on gene 1 do not become jaded... a tamagotchi can rise past having a tarakotchi mother and a hanatchi father that were matched by mrs. busybody, can overcome a troubled childhood and oniotchi adolescense to become a happy, healthy, emotionally-stable mimitchi.) INSPIRATIONAL!