Read this info on [TR70] Flash Cannon in Pokemon Sword Shield: Isle of Armor! Check out where to get it, and what Pokemon can learn Flash Cannon!
Flash Cannon Stats & Where To Get
[TR70] Flash Cannon
|Description||The user gathers all its light energy and releases it all at once. This may also lower the target's SP. Def stat.|
|How To Get||Watt Trader|
Pokemon That Can Learn Flash Cannon
* Can be searched with Pokemon name.