missing 4 mon for the Pokédex

[FloStord]

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

[Saijo]

Corsola is in Apophyll Beach near the cave entrance in the north. I think rain was needed.

As for the others I can trade them at one of the evolutions.

[FloStord]

Evolutions are fine with me too, tell me when you're ready for the exchanges 

I will try this for Corsola

[Starry Knight]

4 hours ago, FloStord said:

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

Pancham is in grass by the berry garden in South Obsidia