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This is probably the most unnecessary tiering thread in the history of Smogon. I can't even see how you can defend this thing being OU if you have ever played gen 6 for even a day.
What other Pokemon do you know can Power-Up Punch a Landorus switch in at +0, take the Intimidate, eat up the...
6th gen OU please. PM me.
Posting the banlist/ruleset since the last guy brought a Mega Gengar: http://www.smogon.com/forums/threads/official-xy-ou-banlist.3491371/