Yeah, that much is pretty much obvious. I was referring to the fact that some people out there seem to think the Ultra Beasts destroyed the Gen 1-5 world(s) and that Gen 6 and 7 are a separate universe due to Mega Evolution. Pretty dumb, really. If they're basing this on Mega Evolution being in OR/AS, that's GameFreak with their usual retcon-to-suit-the-mechanics tricks (see: Magnemite and Magneton in Gen 2, Double Battles in FR/LG and HG/SS (among probably other things), anything changed to Fairy-Type in Gen 6...), and if they're going by the PokéDex, since when has that thing ever been actually reliable (Slugma being hotter than the sun, anyone?), especially with a trickster like Rotom living in it in Gen 7 (which might explain some of those more out there Dex entries as well).

....although I'm trying to figure out why they apparently made it impossible to get normal Raichu outside of transferring one in (since it seems even transferring in a Pikachu from elsewhere will evolve into Alola Raichu because of the fact there's no Alola Pichu/Pika and it's the same evolution method). At least with the other Alola Forms, even though you have to transfer the originals in, there's nothing funky about evolving them and having them remain in original form.