Training Area

You can find one of these just about anywhere you are, labeled nicely and well maintained, despite how torn up the area gets basically every time someone visits.

Here, your Pokemon can learn a new skill, or practice an old on. Read the guide on Skills if you're not sure what do do!

You can also train your Pokemon to gain levels. This is also a solo, oneshot activity, but it can be basically anything! Battle, agility training, practicing moves without gaining skills, whatever you'd like.