As I mentioned in SUPER DRAWING CHIME, I'm working on a Yukkuri Raising game using the Ren'Py Visual Novel engine. It coming together well and I should have a initial release ready by next weekend.
The concept is similar to the Monster Rancher game series. Every day the player can take an action to interact with their yukkuri and it affects invisible stat points. At the end of 30 days, the yukkuri has a little one and its nature depends on the parent's stats.
Updated by HankySpank