Metang

This is a standard Life Orb sweeper Metang. While Metang's Speed isn't impressive, its defenses are, allowing it to hit most foes regardless of whether it gets hit the first turn or not. Bullet Punch covers Sneasel, and can OHKO said Sneasel if it switches into Stealth Rock, which any other set of Metang cannot do (Bar the Choice Band set). Zen Headbutt provides an alternative STAB attack, and is Metang's strongest one bar Meteor Mash at that. Ice Punch is a OHKO on a 0 Defense Gligar, while having an 80% chance at OHKOing a 224 HP / 0 Defense variant, while also slamming Grotle, Grovyle and Bayleef. Earthquake proves as Metang's most powerful secondary attacking move, hitting Lairon, Poliwhirl and some forms of Bronzor for the most damage.

252 Speed ties Metang with a max Speed Shelgon, Mantyke and Lombre, which is recommended, as Metang is threatened with Fire Fang from Shelgon otherwise.

This Metang aims to surprise some of its typical counters by outspeeding them and KOing with the appropriate attack, namely Gligar who attempts to Earthquake Metang, or Magmar coming in and expecting to use Flamethrower. This set, however, does not outspeed max Speed Electabuzz, Kadabra nor Sneasel, and while Bullet Punch may seem tempting, it should be noted that it is a 2HKO on both Kadabra and Sneasel, meaning Metang will be attacked regardless if it uses Bullet Punch or Meteor Mash. Because Meteor Mash is an instant KO to both of these foes, it is recommended over Bullet Punch. Ice Punch surprises Gligar and bulky Grass-types for a 2HKO, while Earthquake covers Magmar and Monferno, who may expect to fry Metang with Flamethrower otherwise. Explosion proves to be Metang's most powerful alternative, allowing it to come in later in the game after being weakened.

The Speed EVs put Metang at a Speed of 318, effectively outspeeding max Speed Magmar, Monferno, Murkrow, Golbat and neutral-natured forms of Kadabra and Electabuzz. Attack is maximized to give Metang the best damage output, while the remaining EVs are delegated to Defense to aid in weaker Earthquakes.

Strikingly similar to lead Metagross in OU, this Metang is geared to set up Stealth Rock, and use Explosion to deal massive damage. Bullet Punch and Earthquake together beat Monferno leads if one uses an Occa Berry, while Roselia leads can be beaten in the same way if Lum Berry is used. Sneasel is also countered by this set by scoring a 2HKO with Bullet Punch, as is lead Kadabras, who can hardly dent Metang anyway albeit Hidden Power Fire, which is fairly rare.

4 Speed ensures that Metang outspeeds a 0 Speed Marshtomp, while the Attack EVs allow Metang to OHKO said Marshtomp (even with maximum Defense and HP) with Explosion, while still scoring a 2HKO on lead Sneasel and Kadabra. The remaining EVs are delegated to maximize Metang's Defense to help with Earthquakes from lead Rhydons who don't invest in maximum Attack, lead Graveler and lead Gligar.

Credit to Rampaging Lairon for this set.

This Metang is geared toward countering Kadabra, Haunter, Magmar and other powerful special attackers. It is one of the few Pokemon able to switch in to a max Sp Atk Dragonair's Draco Meteor, survive, and then live Fire Blast the next turn, the others being Heatproof Bronzor and Togetic. The EVs guarantee that Timid Life Orb Kadabra cannot KO with a Hidden Power Fire, while Metang is then free to set up Light Screen. Metang will then live the next Hidden Power if the foe tries using it again. Pursuit, Meteor Mash coupled with a great typing and good Sp Def base stat make this Metang the end-all solution to Haunter and Kadabra problems. In the last slot, whatever supporting options wanted can be used. Stealth Rock is generally useful, while Earthquake gives Metang the ability to hit Steels, notably Lairon. For an all-out screen setter, Reflect is an option, although a change to Light Clay may prove useful if one chooses to do this. Finally, Explosion can be used if your team needs a way to beat certain threats who Metang can live a hit from. Metang will rarely be able to set up Light Screen and Reflect two times in a row, making it in most cases setup fodder after setting them up the first turn, meaning Explosion proves to be an effective last-move attack.

Credit to Rampaging Lairon for this set.