Under the video games category the have Diamond and Pearl, click on it, and then on the right side of your screed you'll see they'll have the DPPt pokedex click it, and you'll be able to see their stats, what they're weak against, what moves they'll learn at what level, their learnable tms and hms, and their egg moves, and what they can learn from tutors, and things like that...it helps out a lot...tell me if you need anymore help okay?
i wasn't expecting a double battle cuase i wouldn't have sent out two pokemon susceptible to electric moves, i'm better at singles. good battle though. Oh and where do you go on serebii for help?
serebii.net and smogen.com will help you out A LOT...you weren't that bad and when you get your team all set and ready and come up with good strategies, you'll probably be a tough opponent...I'm sure of it, so don't give up just yet...