Never played doubles, but want to try my luck at the event they're having. A match I had:
http://replay.pokemonshowdown.com/xybattlespotdoubles-117228732


Here's the team:

Swoobat @ Focus Sash
Ability: Simple
EVs: 252 Spd / 252 SAtk / 4 SDef
Timid Nature
- Skill Swap
- Heat Wave
- Air Slash
- Psych Up

Torkoal @ White Herb
Ability: White Smoke
EVs: 252 Spd / 252 Atk / 4 HP
Adamant Nature
- Shell Smash
- Earthquake
- Rock Slide
- Protect

Espeon @ Life Orb
Ability: Magic Bounce
EVs: 252 Spd / 252 SAtk / 4 HP
Timid Nature
- Psych Up
- Shadow Ball
- Dazzling Gleam
- Stored Power

Mawile @ Mawilite
Ability: Intimidate
EVs: 252 Atk / 252 HP / 4 SDef
Adamant Nature
- Iron Head
- Sucker Punch
- Fire Fang
- Protect

Sableye @ Sitrus Berry
Ability: Prankster
EVs: 252 SDef / 252 HP / 4 Atk
Careful Nature
- Will-O-Wisp
- Foul Play
- Fake Out
- Recover

Rotom-Heat @ Chesto Berry
Ability: Levitate
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Will-O-Wisp
- Overheat
- Thunderbolt
- Rest

Gimmicky but looks cool, Simple Skill Swap to Torkoal with Shell Smash.
Espeon has Psych Up too.

Tips? I feel I should have maybe Cloyster too. Possibly Aegislash and/or Kang just because they're good in doubles. Clefable gets Follow Me and Psych Up and Helping Hand, etc.