I'm currently raising:
1 TamaGo- it's currently a Shelltchi
1 P1- currently a tamatchi
1 P2- a tonmarutchi (I think that's what this character is called, lol!)
and a V2, but as soon as my V2 has a baby, I might switch it out for my yellow V3... Or maybe I'll just buy more batteries and run them both...