I'm not mad about the whole anime-only mechanics. It's anime. Going straight off game mechanics would be boring af.
But i'm mad that it was a boring battle. I don't care for Pikachu, 1 vs 1 is anticlimactic for the final threat before the league, and Hapu's team had so...
Yes, alone, only with her Pokémon by her side. That's why she speaks in an old-fashioned way, she mimicked her grandparents' style and mannerisms because they were her only "role models". Did you even play the games or you just pet and do weird things with your Lucario?
Story's a bit different...
Gorls you all are forgetting that Hapu grew pretty much isolated from contact with other kids, at least in the games
She only had her grandparents as well as Seafolk Village Joy and the manager at the restaurant. Of course her attitude to same-age peers would be awkward. Give her time.