Pokémon Violet - Lucario Solos 7-Star Tera Rock-Type Chesnaught! - READ DESCRIPTION!
I'm sure you're all wondering about Steel Beam, since it takes some of Lucario's HP after use. The logic was that since Lucario doesn't have good defensive stats, and considering the timing of Chesnaught using his shield, I figured that I need to get as much damage as I can. So every time I knew that Chesnaught was gonna KO Lucario on the next turn, I used Steel Beam for the extra damage. If Lucario is gonna be KO'ed anyway, I might as well allowed it to happen on my terms and use it for my advantage. And yes, it worked very well!