Do you mean Tamagotchi? Tomodachi looks like an entirely different genre than your description.
I have played 'Welcome to Thingdom' and some other games which I think ae similar.
I am a CS student in graduating year, and I think I could work with a complicated timeline. I have seen movies and games with complicated timelines, although have not yet worked on one myself. I would like to join your project. Also I wish to know, is there any payment or revshare for this project?