How cool would it be if you could use HMs to teach your trainers special moves? Maybe then there would be a special trainer battle arena where their Pokémon wait on the sidelines and watch.
There IS trainer combat in Pokemon Tabletop United, if you’re into tabletop games. It’s an awesome concept.
All jokes aside the human repel is a sorely needed item right now. It would have to be a expensive item for the conveinience of course.