Originally Posted by TheEvilDookie
URPG pokemon have no natures. And battle records don't really matter so I don't see why not.
With the instatement of the National Park they do. However, I would like to point out that as long as you haven't joined the National Park yet you can in fact change the nature of your Pokemon, and additionally if you haven't added a Pokemon that wasn't captured in the National Park yet I'm fairly certain you can change it then as well.