Here are some tips that might help. However, I'll not guarantee anything.I think I know something about the required care levels, but I don't know anything specific about the others factors like weights and snacks for some Tamas.
Mametchi: Very good care and playing games for happy hearts rather giving snacks.
Hanatchi: Quite mystery for me, but I think it comes from quite bad care.
Kuchipatchi: Good care, but not as good as for a Mametchi.
Memetchi: Same care as for Kuchipatchi.
Tsunotchi: Mystery, but I think it's the same care level than Hanatchi.
Furawatchi/Leaftchi: Same care as Mametchi but maybe a little spoiled with snacks, however keeping the weight down.
Debatchi: I think it's the same level of care than Kuchipatchi and Memetchi.
Robotchi: I think it's the same level of care than Hanatchi and Tsunotchi.
Warusotchi: Poor care, overweight and spoiling with snacks.
Gozarutchi: Same as for Warusotchi.
ChoMametchi: Same care as for Mametchi/Mimitchi level characters. Maybe a little spoiled but low weight.
Urutchi/Wooltchi: I think it's the same care level as for Robotchi and Hanatchi.
Teketchi: Probably the same care level than Hanatchi and Robotchi.