HMMM Beat doesn't step away from things he sees as his responsibility, BUT he has to see it as his responsibility first. And there's a lot of things he recognizes aren't, even if someone tries to say it is. So he'd also be in the loathes to step away from his responsibilities camp, but the list of things he has as his responsibility is way notably shorter.

So a little of Lusamine via Gladions memories (however altered they may be by Gladions mindset) might be good. The rich thing will resonate hard with what he knows of Josh's life, with the control. And really turn him off of Rich Parents like damn, y'all. His parents weren't rich, just controlling until they couldn't, then nagging.

And let him see those pokemon battles, lets see wee baby Gladion