As far as I know, you get a Furawatchi by treating your teenager perfect, but it has to be on an ODD-NUMBERED generation. 1, 3, 5, 7, you know the drill.
You know I really don't think the odd and even generations matter, I think you just have to get a certain character by treating it different to get another character.
I've bin treating it perfectly apart from it has had tons of toothaches. It hasn't evolved into an adult yet. I will post when it does, which might be tomorrow morning. I read on a post that you have to feed loads of snacks to get furuwatchi. But it early stages with these V2's so nothings really certain yet. It must be one hell of a job trying to put together a growth chart!!!