Read this info on [TR33] Shadow Ball in Pokemon Sword Shield: Isle of Armor! Check out where to get it, and what Pokemon can learn Shadow Ball!
Shadow Ball Stats & Where To Get
[TR33] Shadow Ball
|Description||The user hurls a shadowy blob at the target. This may also lower the target's Sp. Def stat.|
|How To Get||Raid Battle Reward: Rare Drops from raid bosses that is the same type with the move type.|
(Exceptions exist based on Area and Den)
Pokemon That Can Learn Shadow Ball
* Can be searched with Pokemon name.