Jigglypuff and Marill are already confirmed, and it probably extends to at least their evolutions
I'd say there's a better than 90% chance for
>Clefairy line
>Chansey line
>Togepi line
>Snubbull line
>Mawile, especially if she gets an evolution
>Cherubi line
I'd also say that
>Plusle/Minun
>Shroomish line
>Roselia line
>Snorunt line
>Pachirisu
Have little chance of becoming Fairy type.
The rest could go either way
