*it's fine, he's had plenty of experience dealing with rambunctious Pokemon, himself!*

For the more basic ones no, not particularly. If you're looking for something more specialized they might insist on certain skills, but you can get by easily enough just by working at the marts or the Pokemon center in each town you pass through.

And in that case, I'd say you'd definitely want to pay the Ecruteak Gym a visit and see if you can speak to the trainers and leader there, yourself.

*he's not the biggest fan of ghost types, himself, but he's not about to let that get in the way of someone else's interests*