Grotle

After a few Stockpiles, Grotle is nearly impossible to 2HKO, while Leftovers and Leech Seed recovery mean the foe's only real solution is to use Taunt on Grotle, or use Toxic and hope for the best with Toxic stall. Stockpile is Grotle's first priority to get its defenses to a ridiculously high level. After 1 Stockpile, a max Special Attack Haunter with Choice Specs has no hope of 2HKOing Grotle with Shadow Ball, while a max Attack Metang's Ice Punch when equipped with a Life Orb also falls short of a 2HKO. After 2 Stockpiles, Sneasel's Ice Punch is nearly worthless if it ends up being hit with Leech Seed, while Magmar's Flamethrower is easily stalled out with Leech Seed. Synthesis, although it has varying degrees of recovery (at worst 1/4 in hail, rain or a sandstorm), it's enough when coupled with Leftovers, Stockpile and Leech Seed, to provide Grotle enough recovery to stall out the foe in the majority of cases. The choice between Body Slam and Seed Bomb is dependant on what you want Grotle to cover. With Seed Bomb, Rhydon, Gligar, Piloswine, Marshtomp and Croconaw take more damage (Rhydon is always 2HKOed with Seed Bomb). However, common Taunters such as Murkrow and Golbat, as well as mix Magmar, take more damage from Body Slam, and the chance of paralysis is highly useful in Leech Seed stalling.

With sturdy defenses and a very usable Attack stat, Grotle makes a useful Choice Bander for any team who can create synergy with it. The idea here is to synergize with a counter for Magmar, Haunter (everything but Crunch is essentially walled off) and Misdreavus, or use this Grotle as a lure for these threats. At any rate, Grotle can switch into many physical attacks without fear, including Gligar's Stone Edge, Sneasel's Ice Shard (Ice Punch is a 2HKO, however) and Poliwhirl's Ice Punch, while shrugging off Haunter's Thunderbolt, allowing Grotle to hit back with the weapon of choice. Crunch is a OHKO on all Haunters without a Focus Sash, while Superpower hits an incoming Sneasel, Lairon or Nosepass for serious damage. Seed Bomb works well for a powerful STAB attack, but is best used later on when you scout the foe's team because many OU NFEs resist Grass, and the majority of those who don't would never dream of switching into Grotle as it stands (Rhydon, Pupitar, Marshtomp, Piloswine and Cranidos as examples).

36 Speed is invested to allow Grotle to outspeed a minimum Speed Rhydon for a guaranteed OHKO with Seed Bomb. It also allows Grotle to outspeed a minimum Speed Lairon, and KO with Superpower, in spite of its high Defense. The Defense EVs allow Grotle to survive an Ice Punch from a max Attack Sneasel in time for Grotle to KO it with Superpower, while letting Grotle switch into Gligar, Marshtomp, Croconaw and Metang relatively easily.