So i have some information about the new games
My english isn't the best so forgive me about errors

The secret the starters and iwanko share is fusion. They can fuse in battle and stay fused only a few turns. An object is needed for fusion and the more upgraded it is, the longer the pokemons stay fused. I don't know how you level is up though

Rowlet/iwanko is like a griffon
Popplio/iwanko looks like some sort of capricorn, but no horns
I haven't seen litten/iwanko

You have another rival who takes the stronger starter. They didn't reveal yet because he's a ?ember of the new team. He stole his starter like Silver

Hau is actually pretty cool and doesn't kiss your ass like the XY friends

Synchro evolution is not real

What do you want to know ?