General overview: A Double Team match is where 2 of one trainer’s Pokemon face 2 of another trainer’s Pokemon at the same time. In a Double Team match, a greater emphasis is put on strategy and selecting Pokemon that can cooperate with each other for maximum benefit.
Note: Double Team matches follow all the rules that 1 vs. 1 matches follow, unless otherwise noted. If any rules for a Double Team contradict those for a 1 vs. 1, the Double Team rules are used.

I. General Rules and Battle Order

1. When trainers challenge each other, they must agree on DQ times, if returning Pokemon counts as a KO and how many Pokemon will be used during the match. For a Double Team match, the minimum number of Pokemon that will be used is 2.

2. The beginning order will go like this:
-The challenging trainer posts their squad of 6.
-The challenged trainer posts their squad of 6, and sends out 2 Pokemon.
-The challenging trainer sends out their 2 Pokemon, and orders their attacks.
-The challenged trainer orders their attacks.
-The referee refs the result.
-The challenged trainer orders their attacks.
-The challenging trainer orders their attacks
-the referee refs the result, and the order reverses. The challenging trainer attacks first…

And so on. If one or more Pokemon are knocked out on a side:
-The trainer replaces one or both of the KO’d Pokemon. After releasing the new Pokemon (1 or both) they order an attack.
-The opposing trainer orders an attack.
-The referee refs the result and the order reverses.

If both sides have at least one Pokemon knocked out, the order is the same as the beginning of the match. The challenging trainer will replace the KO’d Pokemon with a new one or ones, the challenged trainer will do the same and order an attack, and the challenging trainer will order an attack.

II. When Pokemon are KO'ed

1. I figure this one’s going to need some explaining, since it’s not too clear. When one or more Pokemon on your side are knocked out, you must send out new Pokemon until you have exactly two battle-worthy Pokemon in the battle. So in other words, you can’t hold out and have just one Pokemon fighting, even if it’s in your best interest to do so.
EXAMPLE: say Billy has a Sneasel and an Onix fighting. If either Onix or Sneasel is knocked out, he must send out a new Pokemon to replace the one that was knocked out. If both Onix and Sneasel were knocked out, Billy would return them and send out two new Pokemon. Billy cannot let Onix fight alone if Sneasel is knocked out, and vice versa.
-There is one exception to this rule, however: if replacing the number of KO’d Pokemon would take you over the number of Pokemon you’re allowed to use for the match (i.e., the number of Pokemon both trainers agreed on before the match), you send out Pokemon until you reach that limit. For example, let’s say you’re in a match with 3 Pokemon per side. If both of your first two Pokemon are knocked out, you send out only one more Pokemon, as that one Pokemon brings you up to your maximum of 3 Pokemon per side.
-So in other words, it IS possible for one Pokemon to take on two Pokemon at the same time. If you end up in this situation, well, it sucks to be you.
-Should the battle end up being between one Pokemon a side, the battle continues as if it were a standard 1 vs. 1 battle.

1. Attacks work differently in a Double Team match, since there are now 3-4 Pokemon fighting at the same time instead of just 2. Attacks are divided into 4 groups: area-effect attacks, all-enemy attacks, targeted attacks, and user benefit attacks.

2. Area-effect attacks spread throughout the arena, although not all Pokemon may be affected, however, friend and foe alike can be affected by these attacks. Because of their nature, area-effect attacks do not require a specified target. The list of area-effect attacks is as followed:
-Attract (still works on only opposite gender. If an ally Pokemon is the opposite gender of the Pokemon using Attract, the ally will protect the Attract user at all costs, and will not take kindly to the Attract user being harmed.)
-Cotton Spore
-Earthquake
-Explosion
-Fissure
-Flash
-Haze
-Hydro Pump (Squirtle and Wartortle only)
-Magnitude
-Mist
-Perish Song
-Poison Gas
-Poison Powder
-Rain Dance
-Sandstorm
-Self Destruct
-Sing
-Sleep Powder
-Smog
-Smokescreen
-Snore
-Spikes
-Spore
-Sunny Day

3. All-enemy attacks are similar to area-effect attacks, except that they only effect both enemy Pokemon. Like all attacks, however, all-enemy attacks, can be turned against ally Pokemon if they suffer the misfortune to be in the way of the attack. Like area-effect attacks, all-enemy attacks do not require a specific target. The attacks:
-Bonemerang (Can be used to hit both opponents once or one opponent twice. If used to hit one opponent twice, treat Bonemerang as a targeted attack.)
-Charm
-Encore
-Foresight
-Growl
-Roar
-Screech
-Surf (giant wave of water. Duh.)
-Swagger
-Sweet Scent
-Supersonic (if you want proof, watch the episode where Brock’s Zubat used Supersonic against Ekans and Koffing.)

4. Targeted attacks are moves used against one enemy Pokemon specifically. If it attacks the opponent, and it’s not listed under area-effect or all-enemy attacks, chances are good that it’s a targeted attack. A targeted attack must have a specific target. If one is not given, the Pokemon will randomly attack one of the opposing Pokemon, or not at all, at the referee's discretion. If there is only one opposing Pokemon on the field, logically a specific target does not have to be chosen: the Pokemon will attack the one opponent unless ordered to do otherwise. Examples of this kind of attack are Mega Punch and Flamethrower.

5. User Benefit attacks are attacks that do not affect the enemy Pokemon directly; instead they bring some benefit to the Pokemon that uses it. Examples of this kind of attack are Double Team and Focus Energy. Some of these moves can be used to help ally Pokemon that normally wouldn’t be able to use the move, if the trainer orders a Pokemon to do so. The following attacks can be used by one Pokemon, but they can benefit the other ally Pokemon, if ordered:
-Barrier
-Heal Bell (affects all ally Pokemon, so a specific target isn't needed)
-Light Screen
-Milk Drink (in other words, an ally Pokemon drinks a Miltank’s milk. Got Miltank? ^_~)
-Reflect
-Softboiled (Since there’s no evidence from the anime and from Chansey/Blissey’s pokedex description, I assume Softboiled is where either Pokemon can eat Chansey/Blissey’s egg to regain health.)
To affect the other ally, a trainer must order the attack and then specify the ally to use it on. If no specific ally is given, the Pokemon will use the move on itself.

6. Metronome and Sleep Talk will use a random attack as normal. If the attack requires a target, the Pokemon will pick an opposing Pokemon at random.

7. Like in a normal 1 vs. 1, you must use at least 1 one move attack for each 2 two move attacks you use. However, this is across all Pokemon on your side, so you would be covered if both your Pokemon use a two move attack each one round and one Pokemon uses a one turn move the next.
EXAMPLE: let's say Billy has a Squirtle and Charmander out. Billy could...
-order Squirtle to use Water Gun and Charmander to use Flamethrower. (each Pokemon uses only one attack. This is fine.)
-order Squirtle to use Water Gun and Withdraw and Charmeleon to use Flamethrower. (one Pokemon uses one attack, one Pokemon uses two. This is also fine.)
-order Squirtle to use Water Gun and Withdraw and order Charmander to use Flamethrower and Slash. (both Pokemon use two attacks. This is ok.)
Of course, either Pokemon could use a 3-move combo, as long as the number of 3-move combos hasn't been exceeded in the match.

8. The number of 3 move combos can be found out by this formula: # of Pokemon per side/2= # of 3 move combos (rounded down). These combos are for all Pokemon on your side, so if one of your Pokemon uses a 3 move combo in a 2 Pokemon/side match, your other Pokemon on the field can’t use one.

9. Attacks that require ally Pokemon to work in tandem (ex. a Machop using a Voltorb as a bowling ball, a Growlithe and Charmander combining their Flamethrower attacks into one super Flamethrower, etc.) count as one move for both Pokemon.
EXAMPLE: Billy orders Charmander to kick Squirtle like a soccer ball at an opponent and then use Flamethrower, and orders Squirtle to use Withdraw. Both Pokemon have used two moves, since the team attack counts as one move for both Pokemon.

10. As far as signature moves go, it's up to a referee's judgement to determine what category a sig move falls under, if it applies (i.e., type changes do not have an attack type). If a signature move can be an area-effect attack or a targeted attack, depending on chance, if the targeted attack is chosen at random.
EXAMPLE: take my (Blastoise) Dragonair's sig move:
Special Training: Dragon Summon (Dragon)
Base chance of the attack working is 75%. Ryu summons a dragon to aid it in battle. Only one dragon will appear, but there are several different possibilities:
33% Chinese Dragon: a Chinese dragon appears and blesses both battlers. Both Pokémon are fully healed, all negative status effects are cured, and energy is filled up.
33% Bahamut: the dragon from the Final Fantasy games appears and launches a powerful, type-less attack against the opponent. The opponent has a 1% chance of dying from the shock of the blast unless its trainer spends a service point. Bahamut cannot target the arena, but the arena takes significant damage from the blast.
33% Jormungand: the dragon that killed Thor in Norse legend is summoned, spraying venomous gas onto the battlefield. Both Pokémon in the battle suffer serious damage, a large drop in energy, and are automatically poisoned. There is also a 1% chance of each Pokémon dying from the venomous gas unless their trainer spends a service point.
This attack is limited to 3 successful uses per battle, and a different dragon will appear each time.

So if Bahamut happened to be summoned, one of the Pokemon on the opposing side would be chosen randomly. If Jormungand or the Chinese Dragon were summoned, all Pokemon would suffer or benefit from the effects.

IV. Winning

As in a normal match, standard methods of winning and losing apply.

V. Other Rules

Points will be given out just like a standard match for refs and trainers.

Referees MUST be C-Grade or higher to ref these matches