12 pokemon, 4 teams, need your help!

[Supercowmn]

Now, I have 12 pokemon that I have interest in training (although any recommended pokemon to enhance my team would be appretiated). I have ideas as to what they would do for my team, but any other attack sets for them that could make them serve other purposes would be cool too.
Okay, the whole point of this now is that I've read a bunch of posts and figured out that 3v3 battles are very popular, so finding the most efficient 3 pokemon team is going to be difficult.

Arcanine (Physical)
-Thunder Fang
-Flare Blitz
-Crunch
-Extreme Speed

Lucario
Need good move sets and ideas (special or physical? Which is better?)

Breloom (Physical)
-Stun Spore
-Focus Punch
-Seed Bomb
-Bulk Up

Lapras (Endurance)
I have my Lapras set to attack for the most part as of now, but some moves I can teach him that would increase his "wall" capabilities would be appretiated
-Ice Beam
-Confuse Ray
-Body Slam
-Surf

Magnezone (Special)
-Flash Cannon
-Thunder Wave
-Magent Rise
-Thunder Bolt

Garchomp (currently my least trained pokemon)
-Dragon Rush
-EQ
-Crunch
-Sandstorm

Metagross (Physical/ Endurance)
-EQ
-Iron Defense
-Meteor Mash
-Psychic/Zen Headbutt

Infernape (Physical)
-Brick Break
-Flare Blitz
-Close Combat
-Need another move

Gengar (annoyer/special)
-Toxic
-Sludge Bomb
-Hypnosis
-Dream Eater

Tyranitar (Physical)
-Stone Edge
-Crunch
-Aerial Ace
-EQ

Venasaur (Special)
-Energy Ball
-Frenzy Plant
-Growth
-Sludge Bomb

Kindra (Special)
-Ice Beam
-Dragon Pulse
-Surf
-Draco Meteor

Now, that's all the pokemon I have lined up for myself, help me out with some cool team combinations please!