*Topic moved to 'Help for New Tamagotchi Pet Owners'*
(This suggestion is if your V1 tama is the version with IR "Connexion" - I don't know about the original P1/P2 versions)
You would need to take pretty much perfect care to get the best Mimitchi or Mametchi characters on the V1 Connection/Connexion.
Training bar almost full is not enough.
You'd need full training bar (9 out of 9 bars filled) and almost always keep all four Happy Hearts and all four Hungry Hearts full - never letting them drop below 3 out of 4 hearts full (and if so, to fill them after a very short time).
You also need to try to get your tamas toilet trained as they grow up (and - I think, but can't be sure - remember to switch off the light for them at night).
So, if your training bar was not full, and the Happy & Hungry hearts never emptied (but were not always totally full) you could not get the best character but instead were more likely to get a "2nd best" such as Kuchipatchi and Memetchi. Then, depending on how many training bars you filled and how many times your hearts emptied to 3 or below 3 and how quickly you re-filled them (and other variables such as cleaning the screen after poohs and switching off the light at night, then it is definitely possible to get a Tarakotchi.
I kind of like them to be honest, but I can understand it's frustrating when you are hoping for a perfect care character.
Better luck with the next gen