Lucario. It's cool how it can see auras and use them to it's advantage. There was a movie with Lucario in the title. My only regret is that I haven't seen Lucario and the Mystery of Mew
Mine would be eevee, zoura, zekrom, reshiram, victini, deoxys, and basically all fire and dragon types I love all the eevee forms and most of the water types as well. But if I had to choose one it would be eevee.