Whenever you see wavy lines indicating that your Tama needs to go to the bathroom. There is a schedule depending on their age. If you get them on the toilet in time, you get a few bars. You just have to do this a few times.
You can buy them in the same place that you buy clothes. When you log in, you are in the main area. You then go up to the place with concert hall, and then go to the bottom left. You will then see a fountain and two stores. Go into the first store. There should be two ladies. Go to the second...
A - Apple type: Fuji
B - Bed size: Queen
C - Chore you hate: Poop scooping :P
D - Dog's name: Firkins and Pickles
E - Essential start to your day item: Ice breaker sours
F - Favorite color: Purple
G - Gold or Silver: Silver
H - Height: 5 foot 3 inches
I - Instruments you play(ed)...
The training level is, to my knowledge and discovery, the main influence. The Tama-Go's lose hearts quite frequently, so I was down to zero hearts a few times, but my training bar was full, so I got the perfect characters. This can be good or bad. Good because getting perfect/horrible characters...
You cannot have a baby until you are married.
To marry with another tama, instead of smilies, there should be hearts.
They also need to be 6 years old.
Hope this helps!
I scored 6000 points on the jump game. Around 5000 I saw a Sunnytchi and thought nothing of it. That is, until I got home. And VOILA! Sunnytchi model! IN MY ROOM!