Mawile @ Mawilite
Jolly Nature
40 Hp/252 Atk/216 Spe
- Substitute / Taunt
- Pain Split / Taunt / Iron Head / Brick Break
- Play Rough
- Sucker Punch
I have been using this set to some success. With a Jolly Nature and 216 Speed EVs, you hit 209 Speed, which is just enough to outrun Pokemon with a base Speed of 86. Some noteworthy Pokemon include Choice Band Azumarill, Jellicent, Sylveon, Tyranitar, Vaporeon, Choice Band and Bulky Swords Dance Scizor, Florges, Togekiss and Rotom-W, all of which are either OHKOd, 2HKOd, or if weakened, are put into a position where they can be outsped and killed (this is really only important for Pokemon with priority, like Scizor, whose Bullet Punch would normally cause your Sucker Punch to fail). He's so much fun to use.
I'm still experimenting with teammates in Pokebank OU, but Rotom-W, Heatran, Landorus-T, Salamence, Vaporeon and Goodra have all had pretty interesting results so far. Mawile is really at home on teams that use Volt Switch, U-Turn, hazards, Intimidate users, and also Wish support. I'm thinking of trying out Genesect in tandem with Landorus-T and Rotom-W, maybe also find some room for Latios with Defog as an aggressive hazard remover ala Excadrill.
Oh, also, has anyone done any damage calculations to find out just how much Mawile needs to invest in his Attack stat in order to kill some things? For example, Mawile only needs 16 Atk EVs to OHKO Physically Defensive Togekiss with Iron Head after Stealth Rock, only 40 to 2HKO OU Utility Jellicent with Play Rough after Stealth Rock, only 88 to 2HKO Vaporeon after Stealth Rock - the list goes on. Mawile can't beat certain switch ins, like Heatran, without Brick Break (though, Substitute + Pain Split does let you wear down some faster Pokemon before switching out, or dent certainly Steel-Types on the switch before vamoosing), and is a magnet for status (which is partially why I am so fond of pairing up with Vaporeon - getting burned or paralyzed sucks), which Substitute aids in preventing, and the Speed investment lets him outrun Pokemon that would normally status him.
I am looking for a more efficient EV spread, I guess. If I don't have to max out his Attack, I don't want to, and if there are hits he needs to take, I would rather he survived them. Any ideas?