Hey, well double battles have long been my favourite kind of battle, and sixth gen gave us a lovely new trick roomer so I decided to try and make a trick room team! (Note, although I like doubles, I'm not that good at it, soooooo):
Malamar @ Leftovers
Contrary
EVs: 252 SpD / 252 HP / 4 Atk
Nature: +Atk -Spd
-> Trick Room
-> Superpower
-> Night Slash
-> Psycho Cut / Night Slash
Ampharos @ Ampharosite
Static / Mold Breaker
EVs: 252 SpA / 252 HP / 4 Def
Nature: +SpA -Spd
-> Discharge
-> Dragon Pulse
-> Power Gem
-> Focus Blast
Aegislash @ Life Orb
Stance Change
EVs: 252 Atk / 252 HP / 4 Def
Nature: +Atk -Spd
-> Sacred Sword
-> Iron Head
-> Shadow Claw
-> Kings Shield
Aromatisse @ Leftovers
Healer
EVs: 252 HP / 252 SpA / 4 Def
Nature: +SpA -Spd
-> Trick Room
-> Dazzling Gleam
-> Energy Ball
-> Psychic
Aggron @ Choice Band
Rock Head
EVs: 252 HP / 252 Atk / 4 Def
Nature: +Atk -Spd
-> Head Smash
-> Earthquake
-> Iron Head
-> Aqua Tail
<Not sure on 6th pokemon>
Okay, obviously, this is a trick room team. Mega Ampharos has an insane special attack (165) and very little speed (and I love his shiny), so he was a must on the team. Next, I decided Malamar is probably the best trick roomer in XY, as he has nice STABs and has access to contrary superpower, so can work as a trick room set up-er and then actually do something!
Aromitisse is a back up trick roomer, and is also capable of some offense, but is only really useful for trick room (& Fairy STAB).
Aegislash is a monster in trick room, where his base 60 speed doesn't hinder his monstrous attack. Kings Shield is for turns when I need to set trick room up again, so that he doesn't die, as he has pathetic defenses in Blade forme.
Aggron is amazingly powerful. STAB recoilless Head Smash is insane coming of 110 Base Attack, then with choice band boost, not much is surviving. He doesn't have his mega stone, as that would negate Ampharos', as well as negate STAB and recoilessness on head smash.
I'm not sure on the 6th, any suggestions?