I am missing a few mon to complete the Pokédex, no longer having access to certain areas:
-Natu/Xatu ( I tried the totem but I don't know if there are any particular conditions to have it)
-Porygon (I had to kill him in the computer at the beginning of the adventure and I can't go back to the glitch world)
-Pancham (I renovated the slums and I think there's no way to get it anymore)
-Corsola (according to the Pokédex it can be found in many areas but I tried diving for a long time and found nothing)
I can exchange most of the other mon if necessary
Translated with www.DeepL.com/Translator