Hummmm....Well here I have how to get all the Tamagotchis! Its a paper I printed out, It says: It will develope from Young Mimitchi or Oniontchi, if you you keep both body and heart needs without any misses. Sounds pretty hard.
If you want to get a mimitchi, you must get that weird looking toddler and take really good care of it. O ya and you have it has to be in the 2 generations.