Probably. Mine turned into a character of perfect care tama, Furawatchi, even after I accidently punished him for no reason. Just keep up the perfect care!
If you have a v1.......
perfect care: oniontchi -> mimitchi
about a few misses: oniontchi -> memetchi :D
hunger-good happy-bad: oniontchi -> tarakotchi
hunger-bad happy-good: oniontchi -> robotchi
bad care: oniontchi -> gozarutchi
I don't know about v2 :lol: :D :D