Another large pro of Arti is that it is one of the safest switchins to standard Pert and gets free Roars off all game by switching in on it. On the subject of birds, Moltres in ADV is also pretty cool. You can either go offensive (in which case it works really well with CM BP Cele, Boomgar, and Dug), or as a hybrid pivot with Will-O-Wisp, Sunny Day, and Morning Sun. Wisp is excellent for catching TTar, Mence, Flygon, Lax, and Aero off guard. Even if you're not using Wisp, even a resisted Fire Blast hits these guys decently. If using Moltres, you ought to have a way to deal with/lure Blissey though as it will be almost dead weight otherwise.