Archeops

With its phenomenal 140 / 112 / 110 offenses, Archeops is a regular wrecking ball of flying fury. Its overall good movepool, along with new toys from BW2, such as Heat Wave and Roost, allows Archeops to become a scary Pokemon to deal with. However, there's a reason why such a monster is lurking down in the RU tier, mostly courtesy of an awful ability in Defeatist, which halves Archeops's damage output when its health is lower than 50%. Being weak to Stealth Rock and having piss poor defenses don't help Archeops at all to try and compensate for the ability. Nonetheless, with proper support, Archeops can become an offensive juggernaut.