Gardevior is a third generation Pokémon that was made relevant again in Pokémon X and Y, with the introduction of a Mega Evolution. However, Gardevior is most efficient when it holds a Choice item instead of a Mega Stone; either a Choice Scarf or the Choice Specs.
Shuckle is a very unique Pokémon. Its Defense and Special Defense are outclassed by none, yet its other stats are pitiful. If it wasn’t for its low HP, nothing would be able to take this Pokémon out.
Primeape is an average Pokémon with average stats. However, it can learn a handful of highly damaging moves, and with the help of a Choice Band, you can deal some seriois damage.
Malamar is a new Pokemon in X and Y that few people use in competitive battling. However, its Ability Contrary can be one of the most powerful in the game.
Golurk is a very unique Pokémon that was introduced in Black and White. It has a fantastic Attack stat, and an interesting No Guard Ability.
Drifblim is one of those Pokémon that will be forever remembered as one of the most annoying Pokémon to take out. This lends itself perfectly to competitive battling.
Ludicolo is often utilized on Rain teams because of his two Abilities, Rain Dish and Swift Swim, both of which give benefits to Ludicolo in the rain. However, Ludicolo is mostly only used to set up the Rain condition, or as a Special Wall. However, it has a lot of untapped potential as a Special Sweeper as well.
Crobat is a very unique Pokemon that has an insanely good Speed stat, and a wide move pool to chose from.
Vanilluxe is a Generation V Pokemon that often is criticized for its odd design, but is a decent Pokemon to use in battle.
Talonflame is a Pokémon that has become extremely popular in competitive play since Pokemon X and Y came out.