uxie vs gengar

[Reina Sierpe]

Here's the scenario: uxie LA uses psychic restore against gengar SF and it will be a knock-out. Uxie chooses to go to the bottom of the deck. Does gengar get to roll for fainting spell, or does psychic restore's effect happen before gengar's poke-body is activated?
Thank you!

 

[PokePop]

Here is the section on Fainting Spell in the Compendium:
http://compendium.pokegym.net/compendium-lvx.html#297

Third ruling down is this scenario.