Double Battle

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A Double Battle (Japanese: ダブルバトル Double Battle), also known as a two-on-two battle, is a Pokémon battle with each side featuring two at once. Debuting in the games in Generation III, and featuring occasionally in the prior to this, they may feature up to four Pokémon Trainers. A Double Battle with two Trainers per side who each control one Pokémon is called a Multi Battle.
==In the games==
In a Double Battle, two teams of two Pokémon face each other in battle. One Trainer may control both Pokémon on either side of the battle, or two Trainers may cooperate on one or both sides of the battle, each controlling their own Pokémon (meaning that anywhere from two to four Trainers may take part in a Double Battle).
Some , such as and , automatically engage the player in Double Battles; in Generation III, they will only battle if the player steps on the tile directly in front of them; from Generation IV to , they can move towards the player to initiate such battles; and in Generation VII, they can battle the player from afar but remain stationary (like all other Trainer classes in those games). If the player has only one conscious Pokémon, Trainer classes who will only engage the player in Double Battles will ignore the player and comment that the player should bring two Pokémon to battle them with.
From to Generation V (as well as in ), two independent Trainers who see the player at the same time will engage the player in a Double Battle. If the player has only one conscious Pokémon, the two Trainers who see the player at the same time will take turns battling the player in two Single Battles, with the second Trainer approaching and battling the player immediately after the first Trainer is defeated.
In , all battles that the player participates in are Double Battles. The only way to engage in a Single Battle in Pokémon Colosseum is to do so in battle mode. However, the player does watch a Single Battle between Eagun and Skrub.
In , the majority of battles are Double Battles, similar to Colosseum. However, the first two battles in the game—against Chobin and Naps—are Single Battles, as are all wild battles and one optional battle against a at the entrance to the Pokémon HQ Lab. Some Trainers in Mt. Battle only use one Pokémon, so it is possible to battle them in a Single Battle. The player also watches two Single Battles involving Zook—one with Ardos and one with Biden.
From Generation IV onward, moves that target multiple Pokémon resolve in order of the target's respective Speed stats. If a Pokémon faints, it is not replaced until the end of the turn, rather than immediately after the Pokémon is knocked out, making it possible for a Pokémon's move to fail due to a lack of target if both of the opposing Pokémon are knocked out before it attacks.
In Generation IV and , some NPCs (most notably the stat Trainers in ) accompany the player while they explore certain areas. In these situations, all wild Pokémon encounters are Double Battles against two Pokémon. In such situations, it is impossible to use a Poké Ball to capture a Pokémon unless the other is knocked out first. The NPC Trainer will heal the player's team after every battle. The player cannot use movement-based field moves such as or while accompanied by an NPC.
In Generation V, many routes contain , in which the player has the ability to encounter two wild Pokémon at a time, initiating a wild Double Battle. Similar to the wild Double Battles of Generation IV, it is impossible to use a Poké Ball to catch a Pokémon unless the other Pokémon is knocked out first.
In , every Trainer at Blueberry Academy (excluding the , aside from Ryme) is exclusively fought in a Double Battle.
The HP of Pokémon is not displayed numerically on the player's side in Generation III and Generation IV handheld games—only the bar will be shown to save screen space. The numeric amount of HP can be toggled with the Start button.
The Double Battle format is most notably used in official competitive tournaments like the World Championships.
===Effects on moves===
Several different moves are made specifically for Double Battles, such as . Some others, such as , can have noticeably different effects. In Generation III, if there is more than one target, moves that can hit both foes (but not moves that hit all Pokémon on the field, such as ) have their damage reduced by 50%. In subsequent games, if there is more than one target, any move that can hit multiple Pokémon has its damage reduced by 25%. This damage reduction only takes effect if there are multiple targets when the move is executed whenever or not they would be hit by it, a slot with no Pokémon in it does not count as a target.
The moves , , , , , , , , and have no effect in Single Battles, but do in Double Battles.
The move takes away 1/16th of the maximum HP of the other Pokémon on the same team as the target Pokémon. This damage is not treated as an attack.
The move , while in a Double Battle, can target the ally instead of the user.
The moves , , , , and target the user when selected, but are used against one random foe when executed.
This chart displays all moves that work differently in Double Battles.
Move targets	Move targets	Move targets	Move targets	Move targets	Move targets	Move targets	Move targets
{| width="100%" style="border-collapse:collapse"	  	  	 	 	 	 	
  	  	 	 	 	 	 	
===Effects on Abilities===
Many Abilities are also adapted especially for Double Battles. These Abilities are:
* - If a single-target move is used, it will be forced to strike the Pokémon with this Ability, regardless of the Pokémon originally selected as the target and regardless of the move's accuracy. Moves that target multiple Pokémon cannot be redirected. In Generation V and beyond, the move will raise the stat of the Pokémon and deal no damage to it, unless the Pokémon is immune to the attack by nature of being a .
* - If a Pokémon with Plus is in battle on the same side of the field as a Pokémon with Minus, its stat will be boosted by 50%. In Generation V and beyond, the effect is also present if another Pokémon on the same side has Plus.
* - If a Pokémon with Minus is in battle on the same side of the field as a Pokémon with Plus, its stat will be boosted by 50%. In Generation V and beyond, the effect is also present if another Pokémon on the same side has Minus.
* - If a single-target move is used, it will be forced to strike the Pokémon with this Ability, regardless of the Pokémon originally selected as the target and regardless of the move's accuracy. Moves which target multiple Pokémon cannot be redirected. In Generation V and beyond, the move will raise the stat of the Pokémon and deal no damage to it.
* - The physical and stats of Pokémon with this Ability and their ally are increased by 50% during harsh sunlight.
* - At the end of each turn, an ally's status condition has a 30% chance of being cured.
* - Damage done to allies is reduced by 25%.
* - A Pokémon with this Ability will avoid damage from any moves used by its ally, whether they directly target it or target it as well as opponents.
* - The accuracy of moves used by Pokémon with this ability and their ally are increased by 10%.
* - Pokémon with this Ability and their ally cannot be afflicted by , , , , nor by , , and .
* - Prevents stat drops and status conditions for Pokémon with this Ability (if ) and a Grass-type ally.
* - Pokémon with this Ability and their ally cannot fall .
* , , - Prevents opponents from using priority moves against the Pokémon or its allies.
* - The base power of allies' special moves is increased by 30%.
* - If an ally faints in battle, Receiver will be replaced by the fainted Pokémon's Ability.
* - If an ally faints in battle, Power of Alchemy will be replaced by the fainted Pokémon's Ability.
* - The base power of allies' moves is increased by 30%.
* - The base power of moves used by the Pokémon and its allies is increased by 50%.
* - When a with this Ability is on the same side of the field as a , it will enter the Dondozo's mouth and the latter will have its , , , , and raised by two stages each, at the cost of being unable to switch out. No moves can hit Tatsugiri while it is inside Dondozo's mouth, but the Trainer cannot select any moves for it to execute.
* - When the Pokémon enters a battle, it copies an ally's stat changes.
==In animation==
===Pokémon the Series===
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 have been conducting "illegal" Double Battles since the third episode of , long before the concept was introduced to the . 
In Pokémon Double Trouble, the first official Double Battle occurred. In order to win the , Ash had to defeat Luana's and in a Double Battle at the Kumquat Gym. Though Ash's Pikachu and were initially unwilling to cooperate, they eventually overcame their differences in order to win the battle. A notable difference about this Double Battle compared to the ones introduced later is that winning the match requires only defeating one of the opposing Trainer's two Pokémon.
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After the release of , Double Battles were seen in the animated series more often. 
In All in a Day's Wurmple, the first Double Battle took place. Forrester Franklin introduced the concept to Ash, and they had a battle that Ash won. 
In Solid as a Solrock, Ash's Gym against Tate and Liza is a Double Battle, just like in the games. 
In From Brags to Riches and Shocks and Bonds, in order to qualify for the finals of the Ever Grande Conference, competitors must win three Double Battles in the preliminaries.
In Tactics Theatrics!!, Ash had a Double Battle against Tucker at the Battle Dome. He used his and against the Frontier Brain's and and was able to win the battle, earning the Tactics Symbol, his third Symbol overall.
From The Bicker the Better onwards, Ash teamed up with other Trainers to conduct Tag Battles.
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A Double Battle can also be conducted under Contest Battle rules; more specifically, the battling stage of every Grand Festival uses the Double Battle style. Additionally, with the introduction of Double Performances in Pokémon the Series: Diamond and Pearl, s have to use two Pokémon in both the Performance Stage and the Battle Stage of Pokémon Contests following the format.
In Strategy Begins at Home!, challenged her mother, Johanna, to a Double Battle. Despite having developed a strategy which her and managed to pull off during battle, Dawn still had trouble dealing with Johanna's skills as a Top Coordinator and her well-trained and . As a result, she lost the battle.
In Double-Time Battle Training!, Dawn faced off against Zoey in a Double Battle, using her and against her rival's and . During the battle, Dawn attempted to use a newly developed combination, but it failed and Zoey emerged victorious.
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In Battling the Bully!, there was a pretend Double Battle between and Glenn, both using borrowed Pokémon.
In Evolution by Fire!, Ash battled Shamus, 's original Trainer, in a Double Battle . During the battle, Tepig evolved, giving him enough power to earn victory for his new Trainer.
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In Battling with Elegance and a Big Smile!, battled in a Double Battle . During the battle, Serena's evolved into , allowing her and to even the playing field. However, Aria had to cancel the battle because of an urgent phone call.
In All Eyes on the Future!, Ash battled Olympia in a Double Battle at the Anistar Gym. The battle ended in Ash's victory, earning him the .
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In Trials and Determinations!, Ash's grand trial battle against Olivia was a Double Battle. The battle eventually ended in Ash's victory, earning him a Rockium Z.
In Mission: Total Recall!, battled in a Double Battle at a motel. The battle ended in Faba's victory after he defeated both of Gladion's Pokémon and put him asleep with his 's .
In Acting True to Form!, Ash battled in a Double Battle at Pokémon School. However, the battle was called off after Ash's Pikachu discovered trying to steal Ash's Rowlet.
In Aiming for the Top Floor!, Ash battled Ryuki in a Double Battle at the Kantonian Gym, eventually emerging victorious.
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In Sword and Shield: "From Here to Eternatus!", Ash engaged Chairman Rose in a Double Battle at Hammerlocke Stadium while left to confront . The battle concluded in the next episode, with Ash winning thanks to his newly evolved .
In The Future is Now, Thanks to Strategy!, Ash had a Double Battle with at the Lumiose Gym to try out his 's newly learned . During the battle, Ash's Dracovish also ended up learning , earning Ash a swift victory over his former .
===Pokémon Horizons: The Series===
In The Bittersweet Truth, Liko and Murdock had a two-on-one Double Battle against at the Motostoke Battle Café, with Liko and Murdock using one Pokémon each against Mitchell's two. The battle ended without a clear winner, as Murdock and Mitchell started a bake-off in the middle of the match without ever finishing the battle.
==In the manga==
===Pokémon Adventures===
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In Adding It Up with Plusle & Minun I, challenged a and a aboard the Abandoned Ship.
In On the Loose and Hyper With Zangoose and Seviper I, Ruby and battled a wild and .
In Rayquaza Redemption I, faced Norman in a Double Battle during his training.
In You Can Fight Day or Night With Lunatone & Solrock, Tate and Liza explicitly stated Double Battle tactics during their battle with Blaise, but were overwhelmed by their opponent's illusions.
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In Red and Blue Make Purple Opponents and Double Dealing with Deoxys, and were pitted against each other in a Double Battle by Ultima as her final trial for the two before they could learn her ultimate moves. While battling, the two Trainers had to travel through a corridor, which had two independently moving sides that changed speed and even direction depending on how much damage each of them dealt on their opponents. However, Red and Blue managed to reach the end of the corridor simultaneously, meaning the battle ended in a tie.
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In As Luck Would Have It, Kirlia and Moving Past Milotic, faced several Double Battles against virtual Trainers during his Battle Pike challenge.
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In Ring Around the Roserade II, faced Gardenia in a Double Battle.
In Crowded by Croagunk & Advanced on by Abra I, Paka and Uji fought in a Double Battle against Saturn's Pokémon. 
In Bombastic Bibarel & Heroic Hippopotas, and challenged two in a Double Battle at the Seven Stars Restaurant in order to win prize money.
In Dramatic Drapion & Crafty Kricketune II, Diamond battled two s at Lake Valor to follow through on the promise he made to Paka and Uji to protect Platinum.
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In Groudon Returns and Kyogre Returns, briefly engaged Zinnia in a Double Battle.
In PS615, Ruby and Sapphire faced Zinnia in a Double Battle, with Zinnia's Salamence teaming up with Aster's .
===The Electric Tale of Pikachu===
Similar to the , Double Battles appeared in The Electric Tale of Pikachu before they were formally introduced in the games.
==In the TCG==
A 2­-on-­2 Battle format used to be listed in the Pokémon Trading Card Game ruleset during the EX Series as an unofficial game mode . Players could have up to two Active Pokémon in play (and four in the Bench), and should have the maximum number of Active Pokémon whenever possible. Only one Pokémon could attack during a player's turn, and players would choose which Active Pokémon would attack, defend or receive the effects of cards that targetted the Active spot. Some cards printed during this period also had effects that targetted both of a player's Active Pokémon for this format.
==In other languages==
==Related articles==
* Double Performance
Category:Terminology
Category:Game mechanics
Category:Battle variations
de:Doppelkampf
es:Combate doble
fr:Combat Duo
it:Lotta in Doppio
ja:ダブルバトル
zh:双打对战