Read this info on [TR48] Bulk Up in Pokemon Sword Shield: Isle of Armor! Check out where to get it, and what Pokemon can learn Bulk Up!
Bulk Up Stats & Where To Get
[TR48] Bulk Up
|Description||The user tenses its muscles to bulk up its body, raising both its Attack and Defense stats.|
|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 Bulk Up
* Can be searched with Pokemon name.