This is what I've gathered about the "other universe" and how its been destroyed or whatever, come say if there is anything I'm missing or if there is anything incorrect because i find this lore pretty interesting
>No mega universe is rby all the way to bw2
>Mega universe is xy oras and sm
>Looker is brought through every game since Platinum which will hopefully be explained why in a later game
>He loses his memory when hes brought through to mega universe Hoenn, but somehow has memories with Nanu in SM (does this mean ORAS is after SM or is it a different Looker idk can someone help with that part?)
>Ultra beasts come along to the original world for some reason, possibly a faller was in the non mega universe somehow
>not anything known about what they do but they probably attack the Battle Resort in Hoenn, where Anabel was defending her tower
>During her protecting the tower she either goes into or is sucked into the ultra portal and winds up in the mega universe, with no memories except she had to defend her tower and her name
>Ultra beasts probably do a lot of damage because there arent any megas protecting them
Now this part I haven't seen mentioned much for some reason
>Hoopa comes along with its portals, teleports every legendary, possibly from the original world into ORAS for the protag to catch, meaning they are unable to protect their regions from the Ultra beasts attacks
>Theres also no mega Rayquaza to fly into the meteor, does this mean Hoenns been destroyed?
Thats about all i can think of, but please tell me your theories on whats happened and if I'm wrong on anything