Not likely, he will look up a guide for it...read it off screen and then throw his body back and go "WOAHHHHHH DOOOOD" every time he encounters a "new" boss only to beat the boss on the second try.
Look at Hades for a good example...sure the game isn't the hardest rogue like, but the Pigroach already knew certain things before the game had explained them.
His Elden Ring playthrough is going to involve lots of stalling and off screen guides/grinding....he is going to cheese the game 100% and act smug while he is doing it!