Lopunny

Before ORAS, Lopunny's abilities, while quite good, were never enough to compensate for its middling stats. However, its Mega Evolution grants it significantly better stats and unresisted coverage due to its new ability, Scrappy. Mega Lopunny's base 135 Speed allows it to revenge kill Pokemon such as Darkrai and pull off the fastest Healing Wish in the Ubers metagame. Mega Lopunny can also use Fake Out reliably, because Scrappy removes Ghost-types' immunity. All of this makes Lopunny a potent supporter on hyper offense teams. However, Mega Lopunny is still relatively weak, even with its respectable base 136 Attack, as it cannot hold a power-boosting item such as Life Orb.