Notable Moves: Iron Head Shadow Claw Shadow Sneak Swords Dance Taunt Protect Substitute Rest Agility Destiny Bond Faint Attack Pursuit Brick Break Low Sweep Pain Split Body Slam Night Slash Knock Off Iron Defense Bulldoze Gyro Ball Payback
Based on- http://ts4.mm.bing.net/th?id=H.4916273921590355&pid=15.1
the speed is too centralizing. he beats all the weather mons except for abomasnow, which is already not that good. his movepool gives him too many tools to work with. his stats are perfectly placed. his abilities mitigate any issues he might have had. even away from weather, its typing and abilities are good enough that it could fill a role on any team.
you can pretty much just have that thing do whatever it wants, and it would work. CM + rest + dragon pulse + frost breath with leaf guard in drought looks more or less unkillable. the auto crits from frost breath let it pwn enemy CM set uppers.