Moving Desolation to the Applications folder from the downloads folder worked for me.
EDIT: Game is saved in C:\Users\(your user)\Library (for some reason this folder was hidden for me at first, if you don't see it try command+shift+period)\Application Support\Pokemon Desolation
Unfortunately I am out of ideas on how to fix my server issues lol. I created a topic in Online Play that will hopefully provide answers. Either way, there might be a long wait
Ability Sand Stream, level 60-70, not much else. Unfortunately, I'm having an internet issue and online play does not work, but hopefully I'll get it fixed soon. Thanks for your help!