Hey, this whole "Alolan Oak" will probably be the link to transfer Pokemon from the download 3ds version of the original Pokemon Blue, Red, and Yellow.
With Oak having a cousin in Alola, it'd be natural for Samson Oak to be curious about the 'normal' variations of the Alolan Pokemon (to him, naturally, Alolan Pokemon wouldn't be different.) and since thus far all Alolan form Pokemon have been from Generation one, maybe through Oak's Cousin we could transfer the non-Alolan forms of these Pokemon from those downloaded games from the 20th anniversary.