I don't think my previous post was very helpful
I am not sure if there's a certain list of things to do to get it, by my piroriroritchi only had 2 bars of training (I know, I'm a horrible mom haha! My excuse is that it was my first tama). I don't think it ever slept with its poop, but I rarely exercised it, and i kept feeding it. Its average weight was like, 60 lbs, and one time it even went up to 90+ lbs. I also think I don't check its Hungry and Happy meters that often, so sometimes it has 2 to 3 hearts missing from each.
Basically, don't give it too much attention - be a bad mom/dad. Haha. But I love her, and when she grew up to be a Tarakotchi, I loved her just as much, if not more.
I hope you get a piroriroritchi soon! It's way cute.