On a side note, most of alola alternative version acquired the " dark " type.
Because most of these pokemon have been affected by "urbanism", and so have been "corrupted" from their natural life.
I always thought Alola forms were a pretty cool way for the game to account for the lack of environments on a tropical island, AND mix up the game meta without adding entire new Pokemon. Plus, Alolan Ninetails looks badass.
For someone who doesn't likes Nintendo, Switch got even myself hooked. It's kinda bad though, I was happy I'd only spend cash on one console this generation...