Well Health basically Regulate the same things as Weight does but accounts for more factors. If you stuff too much food into your digimon it won't feel very good that's for sure. It just a stat I invented to make it a lot easier to keep track of a Digimon's health... instead of keeping track of how much they must weight and what not.

-Vit x 10 = Vitality times 10. So far. 9=90 Hp. 

Actually scratch that, I think I came up wrong when I counted. But You still need to put at least 1 point into your Generation stat, or you can't exist. its really that simple. 

And Well, you'll notice if I become annoyed. Because then dark clouds will start to gather by your characters head.