Welcome to the Simple Questions and Simple Answers thread. You guys know the drill: any general question regarding Gen V gameplay (Gens I - IV have a separate thread in The Lost Tower) that can be answered with a single reply, or a relatively short back-and-forth exchange, should be posted here--rather than a new thread being created each time someone has an issue.
For reference, the first Simple Questions thread can be found here, the second here, and the third here. The SQ/SA thread formerly of "Current Events: B&W" can now be found here. And finally, the former HeartGold/SoulSilver-specific SQ/SA thread can be found here.
I do wholeheartedly recommend that you make use of our excellent online encyclopedia, Bulbapedia, as a reference before you post a question in this thread. The answers to virtually all such questions can be found there.