Read this info on [TM58] Assurance in Pokemon Sword Shield: Isle of Armor! Check out where to get it, and what Pokemon can learn Assurance!
Assurance Stats & Where To Get
|Description||If the target has already taken some damage in the same turn, this attack's power is doubled.|
|How To Get||Route 7|
Pokemon That Can Learn Assurance
* Can be searched with Pokemon name.