You can add whichever articles you'd like to (as long as they're Pokémon), be it a place, a Pokémon, et cetera. Just be sure to keep it to the styling conventions (as given to you by the side bar). All you have to do is search the article you want to create, and then click the red link that comes with it. It's quite simple. If you're still having trouble, I'll give it to you step-by-step.
~SL~