It's very hard for me to pick just one but to name a few I'd have to say Typhlosion, Steelix, Latias, Zapdos, Dragonite, Toxicroak, Swampert, Lugia, Groudon, Deoxys, Hydreigon, Zekrom, Salamence, Dusknoir, and Gyarados. And yes I know that's a lot but if I'd have to name one it would probably be Typhlosion.