Rate my VGC doubles team.
As you'll probably notice, this team has a lot of trick room users. The idea is that trick room, while a useful tool, should not be relied upon consistently, and sometimes faking trick room can be more valuable than actually using it. As such, the team was built around a “core” of two, a “slow team” of two, and a “fast team” of two. Testing so far has shown that both pure sets are fairly effective, and that the team can also split its picks to perform mind games or to react to opposing Pokemon without falling apart.

Mawile @ Mawilite
Ability: Intimidate
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Sucker Punch
- Play Rough
- Iron Head
- Protect

Meowstic-M @ Mental Herb
Ability: Prankster
EVs: 252 HP / 140 Def / 116 SpD
Bold Nature
IVs: 0 Atk
- Yawn
- Safeguard
- Swagger
- Quick Guard

Reuniclus @ Life Orb
Ability: Magic Guard
EVs: 252 HP / 252 SpA / 4 SpD
Quiet Nature
IVs: 0 Atk / 0 Spe
- Trick Room
- Psychic
- Shadow Ball
- Energy Ball

Escavalier @ Assault Vest
Ability: Overcoat
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
IVs: 0 Spe
- Megahorn
- Drill Run
- Knock Off
- Iron Head

Garchomp @ Rocky Helmet
Ability: Rough Skin
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Dragon Claw
- Earthquake
- Rock Slide
- Protect

Gengar @ Focus Sash
Ability: Levitate
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Shadow Ball
- Dazzling Gleam
- Thunderbolt
- Protect

My immediate worries are that I have no fighting or fire moves, my EVs are probably shit, and my actual Pokemon choices were picked almost at random, although they seem to work pretty well.
Suggestions are happily accepted, tear this team to shreds.