I'm pretty sure everything that counts as a care mistake on other versions also counts as a care mistake on the V2, but like the V1 and V3, it's a bit more complex than other versions.
The only things I know for a fact count as a care mistake are:
- Missing calls for empty hungry hearts
- Missing calls for empty happy hearts
- Letting the Tama stay sick for a while
- Not turning the lights off when the Tama goes to sleep.
The first three take fifteen minutes after the Tama makes a call before it counts as a care mistake, the fourth one takes an hour. It seems that missing discipline calls (when it calls for no reason and when it's crying/agitated)
may count as a care mistake, but I've never actually tried that for myself before. It doesn't seem that the type of care mistakes influences which teen character a child will evolve into; it only seems to affect teen-to-adult evolution.
Here's a detailed look at how teen-to-adult evolution works, if you're interested (I know it's not quite what you had asked, but I thought it might be useful anyway
)
Giving a teen one or no care mistakes results in a Tier 1 adult. A Tier 2 adult can be obtained with a minimum of two overall, and a maximum of two in both physical and emotional care (four overall).
Missing calls for empty happy hearts or the lights (and possibly when it's crying/agitated) count as emotional care mistakes, and giving a teen at least three of those results in a Tier 3 adult.
Missing calls for empty hungry hearts or sickness (and possibly when it makes a call for no reason) count as physical care mistakes, and giving a teen at least three of those results in a Tier 4 adult. Sickness and empty hunger are more risky, though, so it's tougher to get a Tier 4 adult.
Many care mistakes in both emotional and physical care should result in a Tier 5 adult, but I admit I've never obtained one before.
Sorry if I went a bit overboard with the information
Regardless, I hope I helped!