Hi,
At the request of Zenos, I adapted every gen8 sprites from Smogon Project.
The original pack is available here :
Original Sprites: https://www.smogon.com/forums/threads/sword-shield-sprite-project.3647722/

And here is the pack adapted to SDK:
https://mega.nz/file/HcQ0WbhD#Qf-MNA5OCngnJmi13PPnqlYKefG05BG320CSCQrRrrQ
You just have to extract it at the root of your project.

Credits:
Gen 8 Pokemon Sprites - All Contributors To Smogon Sword/Shield Sprite Project
Adapted to PSDK by Metaiko and Zenos
Adapted to PSDK using Ant Renamer and Photoshop