TamaTomo unlocks by connecting

In addition to my white iD L (which I'm currently running), I received my blue and green iD Ls today!

My Tama also gave birth to a boy, so that means I can now unlock Hirotchi which requires connection to six or more different Tamas.

I know this can be done by "resetting" the second iD L. Will this work even if all of them were babies?

I'm planning to wait for my white iD L to become a teen then do a few hatch/connect/reset cycles on the second iD L so I'd get six different connections.

When you reset your iD L, this wipes everything clean and gives the impression to the other iD L that this is a completely new Tamagotchi that hasn't been encountered before. So, yes, it will work.

So it needs six or more "unique" connections, right?

6 connections or more yes. Each time you reset the one you are resetting, its like a new username/tamagotchi. Then they show when you connect them friendship levels... (IDL to 15th Anniversary for ref)