Gonna do some Gen 6 theorymonning now, bear with me.
Noivern is an incredibly fast, bulky pokemon with a decent Sp. Atk of 100-105, who also learns Draco Meteor, Hurricane, and a move called Boomburst, a power 100 Normal-Type Earthquake
Malamar is a slow but bulky mon who knows a move called Topsy Turvy, which when used on an enemy or ally, flips stat effects similar to contrary
So here's my plan. First turn Noivern nukes someone on the enemy team with Draco Meteor. Unless priority or Scarf is used, he WILL go first, as he's faster than most. The Draco Meteor, assuming it's used on a squishy mon, will get a kill. Then, assuming both of them tanked the remaining Pokemon's attack (Which they most likely will have, as they are both fairly bulky), Malamar uses Topsy Turvy on Noivern, giving him a x2 special attack boost.
Noivern then spams Boomburst, Draco Meteor and Hurricane as much as he wants with a free x2 special attack, which should in theory, cover most types and massacre the enemy, while Malamar reverses any debuffs the enemy tries to place on Noivern.