Rule variants

Rule variants, also known as formats, are sets of regulations that players follow when engaging in competitive s. Rule variants typically restrict the species, levels, items, and moves of , or place time limits on battles.
Rules are employed in official settings (such as in-game content and officially organized tournaments), as well as unofficial settings.
==Rules==
While normally banning unreleased and/or illegitimate Pokémon, moves, items, and Abilities, there are other sets of rules set to be followed by players in varying contexts, be they official or otherwise. These are often called "clauses," a term initially seen in the Stadium series of games, used as a shorthand for more complex rules that impose restrictions on gameplay. Clauses are commonly made with the aim of reducing variance and thus producing a "fairer" metagame. 
Many unofficial clauses are seen on Smogon, a popular competitive Pokémon website. On Smogon, rules are often proposed through "suspect tests" initiated by a council of players particularly dedicated to the metagame in question, wherein qualified tournament and ladder players will then vote on whether or not the rule will be instated, usually requiring a majority of 61% or higher. Common Smogon-popularized clauses include OHKO clause, clause, Moody clause, and endless battle clause, which are seen across all of their metagames, being dubbed "Smogon-wide Clauses".
The following clauses have seen considerable usage:
* Species clause: Each Pokémon on a player's team must be of different species or .
* Item clause: Each Pokémon on a player's team must be holding different items.
* Sleep clause: Each player can only have one Pokémon asleep at a time.
**Sleep inflicted through and count for the , , and ; also, in those games, when a Pokémon is sleeping and one of its teammates is attacked by a move that induces sleep like , the move fails. However, self-inflicted sleep still succeeds.
**In Smogon metagames, self-inflicted sleep through does not count.
**In the event of an outright sleep ban, seen in some Generation I, , and metagames, the rule is referred to as Sleep moves clause.
* OHKO clause: , , , and are banned. 
* Freeze clause: Each player can only have one Pokémon frozen at a time. 
** In the Pokémon Stadium side series, when a Pokémon is frozen and another Pokémon of the same team is attacked with a move that causes , the Freeze rate is reduced to 0%.
* Evasion clause: and are banned. This is sometimes expanded to include less direct measures to increase evasion, such as , , , and . While not boosting evasion itself, items such as Bright Powder which have a mostly equivalent effect are sometimes banned in the spirit of the rule.
* Event clause: Pokémon and items that have only been released through events, such as , are ineligible. The ban is rarely referred to by name due to the Pokémon (and sometimes items) banned being specified.
* Moody clause: The ability is banned. Commonly used on Smogon.
* Baton Pass clause: Commonly used on Smogon, this comprises various restrictions on , ranging from an outright ban to an arbitrary number of users per team. Commonly seen in Single Battle metagames where full Baton Pass teams can easily spiral out of control. These bans can get quite specific, such as "TrapPass clause" in Generation II metagames, which bans the use of Baton Pass alongside or , due to the combination causing Pokémon to remain unable to escape.
* Swagger clause: Followed mainly in Generation V and competitive play on Smogon, the move is banned. With more moves being banworthy since then, the clause is rarely referred to by name in modern times.
* Self-KO clause: The player automatically loses if their last Pokémon uses or . and also fail when used by the last Pokémon.
* Terastal clause: Pokémon cannot stallize. Commonly seen in constructed metagames, such as "Pet Mods" on Pokémon Showdown.
* Dynamax clause: Pokémon cannot Dynamax or Gigantamax.
* Gems clause: Exclusive to Generation V, the only generation where Gems other than the Normal Gem are obtainable, and bans their use. It appears specifically in Smogon's OverUsed metagame.
* Mega Rayquaza clause: cannot Mega Evolve. Used in Smogon's Generation VI and "Uber" metagames.
* Deoxys camouflage clause: Seen in Generation III metagames and can be turned on in . formes are revealed upon entering battle.
* SleepTrap clause: Followed mainly in Generation II competitive play, -inducing moves cannot be used in conjunction with moves that trap the opposing Pokémon permanently such as . Given the nature, moves like are exempt.
* Cleric clause: Seen in Generations I and II handheld games. All Pokémon must be healthy at the beginning of the battle, this means that they must have full HP, full PP, and no status conditions like or . Games like Pokémon Stadium enforce this rule automatically by "curing" all Pokémon before the battle.
*Tradeback clause: Exclusive to Generation I metagames. Players cannot use Pokémon with moves they can only learn in Generation II; eg. or .
* Invulnerability clause: Exclusive to Generation I metagames.RBY OU Ruleset This bans the use of and , due to a glitch involving Pokémon becoming invincible when the moves are interrupted by or .
There are other rules normally followed only by official tournaments, such as:
* Nickname clause: No two or more Pokémon can have the same nickname.
** Additionally, Pokémon cannot be nicknamed with the name of another Pokémon (e.g. an named "Pidove" or "Arbok").
* Level Sum Limit: Seen in Generations I and II's official competitive formats, with the exception of Prime Cup. The three Pokémon that were chosen for the battle should have a specific Level Sum, e.g., in the case of the Poké Cup, the Level Sum Limit must be between 150 and 155, effectively giving five levels to distribute amongst Pokémon.
In addition, official tournaments in Generation V onward have required the use of the feature, locking it upon entry. Plus, official tournaments will often limit the amount of Pokémon that can be brought into a game; usually, three for Single Battles, and four for Double Battles.
==Tiers==
In unofficial multiplayer play, Pokémon are typically divided into tiers. A Pokémon's tier placing depends on several factors, including its base stats, type, Abilities, movepool, and usage. 
Tiers also serve as banlists. Battles take place according to tier, with all Pokémon in a higher tier banned. In the most common metagame, the Standard or Overused metagame, all Pokémon in the Uber tier are banned. In the Underused metagame, all Pokémon in the Borderline or higher tiers are banned. 
As a variation of tiers, in certain communities, players are only allowed to use a maximum of one Pokémon out of a select group of Pokémon. This group of Pokémon is usually limited to and pseudo-legendary Pokémon.
==Generation I==
===In the games===
====Pokémon Stadium (Japanese)====
The game, which was only released in Japan on August 1, 1998, features a tournament mode with two divisions: the L1-30 division, based on Nintendo Cup '98, and the L50-55 division, based on Nintendo Cup '97. The finalists from the Nintendo Cup '97 appear as opponents in the L50-55 Division.
Each division features a set of rules that would become standard for all console games: 
* The species, self-KO, sleep, and freeze clauses are in effect.
* Both teams are shown before the battle, and each player must select three Pokémon to battle. 
The game also features a Free Battle mode where players can customize the rules.
 	L1-30 Division	L50-55 Division
Level Limit	1-30 	50-55
Total Level	N/A 	155
====Pokémon Yellow====
The Cable Club in and feature no rule regulations. However, features an exclusive battle arena, Colosseum 2, with three Cups.
Each player can only use three Pokémon, and no additional rules are in effect, with the exception of level limitations. These Cups would later be used in the international Pokémon Stadium and future international tournaments. 
 	 	 	
Level Limit	15-20	25-30	50-55
Total Level	50 	80 	155
====Pokémon Stadium====
The second Pokémon Stadium game, which was released internationally as Pokémon Stadium, features tournaments called Stadium Cups.
All versions of Pokémon Stadium featured the Pika and Petit Cups from Pokémon Yellow Version's Colosseum 2, along with the Prime Cup, a no-holds barred tournament based on the normal Cable Club battles. 
The Japanese version, known as Pokémon Stadium 2, also features three Nintendo Cups based on the first three Japanese tournaments, , , and . In-game representatives of its real-life participants appear as opponents in Round 2 of Nintendo Cup '98, while Nintendo Cup '99 and the Prime Cup each have four divisions. All three cups follow the species, self-KO, sleep, freeze, and event clauses.
 	 	 	
Level Limit	50-55	1-30	1-50
Total Level	155 	N/A 	N/A
In the international versions, the Nintendo Cups were replaced with the Poké Cup from Yellow's Colosseum 2. The Poké Cup features the four divisions and the arena of Nintendo Cup '99, but the rules of Nintendo Cup '97. All four Cups follow the species, self-KO, sleep, and freeze clauses, while only the Pika and Poké Cups follow the event clause.
 	 	 	 	
Level Limit	15-20	25-30	50-55	N/A
Total Level	50 	80 	155 	N/A
Pokémon Stadium also introduced a Gym Leader Castle, where the player has to defeat the eight Gym Leaders and the Elite Four of the Generation I games. While the Castle features no level restrictions, all of the opposing Pokémon will be at level 50 by default. If the player uses a higher leveled Pokémon, all of the opponents' Pokémon would be at the same level as the player's highest-leveled Pokémon. A similar auto-leveling feature would appear in the battling facilities such as the Generation III Battle Frontier. The Castle features the same clauses as the Stadium Cups.
Pokémon Stadium was also the first Pokémon game that allowed more than two players to battle at a time. Up to four players can compete in the Free Battle mode; if two players are on a team, each player can only select and control three Pokémon. A similar mode of play, Multi Battle, was introduced in the Generation III main series games.
===In tournaments===
====Nintendo Cup '97====
A series of annual tournaments sponsored by Nintendo began in 1997, taking place in various locations across Japan. These tournaments, which would later be referred to as Nintendo Cups in the Japanese version of the Pokémon Stadium series, established the first set of rule variants that would pave the way for future tournaments and Pokémon games.
In the first of these tournaments, Nintendo Cup '97, Full Battles did not take place due to time constraints, instead, each player selected three Pokémon to battle after showing their party of six to their opponent. The battles took place in the Game Boy.
The event consisted of 15 regional tournaments. At the end, the 15 champions competed in a national tournament to determine who was the best trainer. The national event took place during the Nintendo Space World '97. Toru "Miyasawa" won the tournament thus becoming the first national champion in Pokémon History; on the other hand, Hiroki Yoshi was the runner-up, while the third place was a tie between Yojiro Yuki and Yusuke Suzuki. The champion and the runner-up got a Nintendo 64 console.https://web.archive.org/web/19980224224633/http://www.nintendo.co.jp/n12/report/112302.htmlhttps://archive.org/details/JapanTVShowNintendoSpaceWorld1997CoverageNINTENDO97http://pokemon.s20.xrea.com/historia-single.html#1997
The players of the national tournament were depicted as opponents in the , with 8 out of the 15 players being randomly selected to appear on any given playthrough. In addition, most of the Pokémon that appeared in Pokémon Stadium were selected due to their tournament performance. Pokémon Stadium Q&A
In the international scene, the Nintendo Cup '97 was renamed Poké Cup and appeared in the games Pokémon Yellow and Pokémon Stadium 1.
====Nintendo Cup '98====
The Nintendo Cup '98 made use of the 12 days before it was officially released. In the tournament, only Pokémon that were available in that game were allowed to participate. The restriction to level 30 or lower narrowed down the choice of Pokémon even further, with a total of 33 species legal for use. 
Like the previous event, the Nintendo Cup '98 was divided into two phases: seven local tournaments and one national tournament. The national tournament took place at the Studio 1 of TV Tokyo on August 30, 1998. The contestants were the seven champions from the local tournaments. Norishige Hanamoto was the champion, Tatsuya Hori was the runner-up, Shinji Yoshikawa won the third place and Shōhei Yanagisawa won the fourth place. The first three places got a gold, silver and bronze trophy respectively, and the first four places got a Game Boy Light, a Game Boy Printer and a copy of Pokémon Yellow Version once it was released.https://www.nintendo.co.jp/n01/n64/software/nus_p_npsj/btour/yosen.htmlhttps://www.nintendo.co.jp/n01/n64/software/nus_p_npsj/btour/
The seven finalists of the national tournament, along with one generic trainer to fill out the roster, were depicted as opponents in the second Japanese Pokémon Stadium game, in the Round 2 mode.
====Spring Pokémon League====
The Spring Pokémon League was a series of tournaments organized by Nintendo. The events took place in March and April 1999 in Japan. To give variety to the game, the tournaments used the rules of the Petit Cup, which only allowed "cute" Pokémon. Battles used Pokémon Stadium 1 before it was released, and the competitors could use their Pokémon from their Game Boy cartridges. To participate, players had to send a postcard to Nintendo before a certain date, after which the company sent them an invitation in case they were selected or a notice of loss in case they were rejected. The reply mail was sent at least one week before each tournament started and there was no entry fee.
There were five regional tournaments. The Kumamoto tournament took place on March 27 and 28 at the TKU Plaza and was won by Naruyoshi Isasaka. The Osaka tournament took place on April 4 at the ATC Hall and was won by Atsushi Fujiwara. The Tokyo tournament took place on April 11 at the Tokyo Ryutsu Center and was won by Yasuaki Yoshitake. The Sendai tournament took place on April 25 at the San Festa and was won by Zenichiro Murakami. Finally, the Nagoya tournament took place on April 29 at the Fukiage Hall and was won by Kenta Takeshita. Unlike the previous events, there was not a national tournament.http://pokemon.s20.xrea.com/historia-single.html#1999
====Nintendo Cup '99====
Nintendo Cup '99 combined aspects from the previous tournaments. In addition to the legendary Pokémon and , the Pokémon used by the finalists of the Nintendo Cup '97 and the Nintendo Cup '98 were also banned from the tournament. In the event, battles took place in Pokémon Stadium 1 where players used the Transfer Pak to use their teams from Pokémon Red, Green, Blue and Yellow.
Nintendo Cup '99 also consisted of two phases: 12 local tournaments and one national tournament. The national tournament took place during the Nintendo Space World '99. The contestants were the 12 champions from the local tournaments. Yukifumi Aoki was the champion, Yasuhito Kajihara was the runner-up and Akihiro Nagai won the third place.http://pokemon.s20.xrea.com/historia-single.html#1999
Nintendo Cup '99 also appeared in Pokémon Stadium 1; however it was cut in the international version.
====Pokémon League Summer Training Tour '99====
The Pokémon League Summer Training Tour '99 was the first series of Pokémon tournaments that took place in the United States. From July 10 to September 12 players could visit the nearest mall to compete in Pokémon battles, play Trading Card Game matches, try out the new titles: Pokémon Pinball and Pokémon Snap, participate in a Mew distribution event or watch Nintendo employees demonstrating the upcoming game: Pokémon Yellow. The event took place in 20 cities, these were: Minneapolis, Milwaukee, Chicago, Kansas City (Missouri), Salt Lake City, Portland, San Francisco, Sacramento, Los Angeles, San Diego, Indianapolis, Cincinnati, Detroit, Memphis, Dallas, Jacksonville, Charlotte, Bethesda (Maryland), New Jersey and New York. Each city had its own series of tournaments.
The event was also famous because it marked the debut of the Pika Cup, the Poké Cup and the Prime Cup outside of Japan. The Pika Cup was for Pokémon of Levels 15-20 ( and were banned along with Pokémon that were impossible to obtain at those levels); on the other hand, the Poké Cup was for Pokémon of levels 50-55 (Mewtwo and Mew were still banned); finally, the Prime Cup was for Pokémon of levels 1-100 (Mewtwo and Mew were allowed).
Each division was opened to a maximum of 1,000 players between ages 7 to 14. To participate, players had to bring their Game Boy, Game Boy Pocket or Game Boy Color and a game of Pokémon Red or Pokémon Blue; Link Cables were provided by Nintendo employees and battles took place with Colosseum 1 mechanics. Before each battle, players had to show their six Pokémon to their opponent (all had to be of a different species), then they had to choose three for the battle and deposit the other three in Bill's PC. Like their Japanese counterparts, the Pika Cup and the Poké Cup had a Level Sum Limit for the Pokémon that were chosen for the battle: 50 for the Pika Cup and 155 for the Poké Cup. All formats featured Freeze, Sleep and Self-KO clauses; finally, if a player's Game Boy ran out of batteries he lost the match.
All tournament registrants got a Pokémon sticker sheet, a mini-poster with all the Pokémon, a window decal and a tournament brochure. Players could also earn Badges depending on their performance: a Competition Badge just for competing, a Boulder Badge for winning one match and a Cascade Badge for winning two matches. Players that earned the three Badges could be selected to play against a Gym Leader from Nintendo, they got a Pokémon Trainer Cap in case they won.https://www.ign.com/articles/1999/07/08/pokemon-summer-training-tour-kicks-offhttp://archive.thegia.com/features/f990814.htmlhttp://www.nintendoworldreport.com/feature/41952/poke-memories-justin-berube-features-editor
Due to the success of the event, it was extended from October 9 to November 7. The second half of the event was renamed as the Pokémon League Nintendo Training Tour '99 due to the change of season. The new event included San Francisco and Los Angeles and six new cities: Las Vegas, Philadelphia, Boston, Mesa (Arizona), St. Louis and Miami. The formats and rules were the same; however, the tournaments were now opened for players of all ages and Pokémon Yellow was banned despite the fact that it was officially released during the first days of the event.
File: Pokemon League Summer Training Tour 99 picture 1.jpeg|A picture of the Dallas event, some kids can be seen playing competitive battles in the left.
File: Pokemon League Summer Training Tour 99 picture 2.jpeg|Nintendo employees demonstrating the upcoming game: Pokémon Yellow.
File: Pokemon League Summer Training Tour 99 picture 3.jpg|The Pikabeetle.
File: Pokemon League Summer Training Tour 99 paraphernalia.png|Pokémon paraphernalia that was given away to the people that registered for the tournaments.
File: Pokemon League Summer Training Tour 99 Ruleset.jpeg|The rules of the different formats.
====Pokémon 2000 Stadium Tour====
A series of tournaments were held in Canada and the United States during the Pokémon 2000 Stadium Tour, which took place to promote Pokémon Stadium. Competitors were separated into three skill groups: Beginner, Intermediate and Advanced. Each skill group was assigned to one division of Pokémon Stadium: Pika Cup for Beginners, Poké Cup for Intermediate players and Prime Cup for Advanced players. Battles took place in the Game Boy and in Pokémon Stadium. In the case of the Game Boy, if both players had Yellow they played in the Colosseum 2 mode; however, if one used Red or Blue instead of Yellow they played in the Colosseum 1.https://web.archive.org/web/20000303033354/http://www.pokemon.com/events/stadiumtour_rules.html
====Pokémon 2000 World Championship====
Thunder for Down Under, a worldwide qualifier, took place in various countries in the year 2000. In this tournament, players from Australia, Belgium, France, Germany, the Netherlands, Spain, the United Kingdom, and the United States all competed in regional championships, with the winners heading for the Pokémon 2000 World Championship, the first Pokémon World Championship, in Sydney, Australia. The regional and Continental events featured three formats: Pika Cup, Poké Cup and Prime Cup; however, the World event only featured the Prime Cup. Pokémon Stadium was used for the battles. Regarding the Prime Cup rules, Mewtwo was allowed in the Spanish tournament, on the other hand, Mew was banned in all the events. Darryn Van Vuuren, from the United Kingdom, won the World tournament thus becoming the first World Champion in Pokémon History; on the other hand, Edwin Krause from Germany finished on second place, Sergio García Maroto from Spain finished on third place and Ian Garvey from the United States finished on fourth place.https://www.ign.com/articles/2000/09/06/hes-the-masterhttps://informepokemon.wordpress.com/2020/03/19/reconstruyendo-un-gran-pedazo-de-historia/
==Generation II==
===In the games===
====Pokémon Stadium 2====
The final Pokémon Stadium game, Pokémon Stadium 2, features four Stadium Cups. The Poké and Prime Cups returned from the original; however, the Prime Cup only had one division. The Little Cup and the Challenge Cup were added, with the latter featuring four divisions. The moves and are banned in the Little Cup, making it the first rule variant to prohibit certain moves. In the game, players can customize and save various sets of rules. Still, all cups follow the species, item, self-KO, sleep, and freeze clauses; only the Prime Cup follows the event clause. With a total limit of 155, only the Poké Cup has a total level limit.
 	 	 	 	
Level Limit	5	Varies	50-55	N/A
====Pokémon Crystal====
 introduced the first , a special battling facility. The Battle Tower's rules are similar to Pokémon Stadium's, and this was later followed by future Battle Towers:
* Players must select three different Pokémon to battle.
* All Pokémon must be holding different items.
A change from the Pokémon Stadium games, a draw will end the player's streak, even if the opponent's Pokémon causes the draw with a move such as Explosion. Also, items cannot be used from the Bag. 
Unlike future Battle Towers, event Pokémon can be used in the level 70 and higher divisions.
===In tournaments===
====Nintendo Cup 2000====
In Japan, a fourth series of tournaments for the Pokémon games, Nintendo Cup 2000, was held. The event used Pokémon Stadium 2 to organize battles days before the game was officially released. Similar to Nintendo Cup '97, the tournaments took place using Pokémon from levels 50-55, with a total limit of 155. At the end, the winners of the eleven local tournaments competed in a national tournament. Yuki Sato won the event, Akira Nakamura finished on second place and Tatsuaki Fujita finished on third place. The runner-up and the third place won a silver and a bronze trophy respectively, on the other hand, the champion won a Game Boy Advance once it was released.https://www.nintendo.co.jp/n01/n64/software/nus_p_np3j/league/http://pokemon.s20.xrea.com/historia-single.html#2000
Like the other official tournaments, the Nintendo Cup 2000 appeared in the game Pokémon Stadium 2. In the English versions of the game, the format inherited the name of the Poké Cup due to its similarities with the tournament that appeared in the international Pokémon Stadium 1.
====Mobile Cup 2001====
The last Japanese national tournament of the Game Boy Color era, the Mobile Cup 2001, was held with 1,000 players who were selected in a drawing. It used the Mobile System GB, a feature exclusive of the Japanese .http://pokemon.s20.xrea.com/historia-single.html#2001https://youtu.be/5iqsg8yiQR0?t=720
The tournament used Pokémon from levels 1 to 30. Each player had three Pokémon and brought them all into the battle. The rules only said that Mew and Celebi were banned; however, technically other 22 Pokémon were also banned because they were unavailable at level 30. Unlike previous tournaments, Species Clause was absent; also, Team Preview, Sleep Clause, Freeze Clause and Self-KO Clause were only enforced in the semi-finals, the third place play-off and the final. Another oddity was that players didn't face each other until the semi-finals. In the first six rounds, each player had to defeat a Nintendo player in a Mobile Battle in Pokémon Crystal within a 10-minute time limit. Players who won a round received a Trainer Certification Card. Players were also allowed to change teams after each round.https://dengekionline.com/data/news/2001/4/18/e7cc7e57c9e986401d7ee24435937a2d.html
On the day of the match, the player got a phone call from the Nintendo player, the latter initiating the communications so that the company would pay the charges of the match. Players who disconnected or ran out of time lost the battle and were eliminated from the tournament. In the sixth round, the four players that spent the fewest turns to win the match advanced to the semi-finals; it was called the "Extra Match," implying that it could be an unexpected play-off round for the semi-finals.https://gamememolog.hatenablog.com/entry/2013/04/06/035300 
The last matches took place at the Nintendo Space World 2001 and were played on Pokémon Stadium 2. Akihiro Nagai won the tournament, Shiori Yamamoto was the runner-up, Kotaro Ochiai finished on third place and Mika Fujita on fourth. The four players got a Celebi-colored Game Boy Advance and a certificate while the champion was also rewarded with an e-Reader once it was released.
https://web.archive.org/web/20160917205417/https://www.nintendo.co.jp/event/sw2001/sokuho/26/page09.htmlhttps://web.archive.org/web/20160917205749/https://www.nintendo.co.jp/event/sw2001/sokuho/26/page09_2.html
====The First Pokémon Champion Tournament====
The First Pokémon Champion Tournamenthttps://pokemon.fandom.com/ko/wiki/%EC%A0%9C1%ED%9A%8C_%ED%8F%AC%EC%BC%93%EB%AA%AC%EC%8A%A4%ED%84%B0_%EC%B1%94%ED%94%BC%EC%98%A8%EC%A0%84https://web.archive.org/web/20151105181707/http://ruliweb.daum.net/news/view/3238.daumhttps://ja.namu.wiki/w/%ED%8F%AC%EC%BC%93%EB%AA%AC%EC%8A%A4%ED%84%B0/%EB%8C%80%EC%A0%84/2%EC%84%B8%EB%8C%80#s-4.1 was the first official competition of South Korea. It took place on Tuesday, July 29th 2003 at Seoul’s Olympic Weightlifting Gymnasium. The tournament was organized by Mr. Ohara from Daewon C.I., a comics company. One thousand players participated in the event. At the request of Nintendo of Japan, the first phase consisted of a quiz where players had to answer difficult questions related to Pokémon. All questions had two possible answers: true or false and only 64 players could advance to the next round. The second phase consisted of a series of 3 VS 3 battles; finally, the quarter finals, the semi-finals, the third place play-off and the final consisted of a series of 6 VS 6 battles. Matches were played on the Game Boy (normal, Color or Advance), except the quarter finals, the semi-finals, the third place play-off and the final which were played on the Game Boy Player. The finals were also broadcast on a jumbotron so the crowd could watch them.
Because the Gen I games, Pokémon Crystal and Pokémon Stadium 2 were not released in South Korea, only Pokémon that could be obtained in Pokémon Gold and Silver were allowed (with the exception of and ). Pokémon had to be between Levels 1 to 55 and there was no Level Sum Limit for the Pokémon that were chosen for the battle. All Held Items were banned, also, in contrast with other competitions of the era, Sleep and Freeze Clauses were not enforced; if a player managed to Freeze and/or put to Sleep all of his opponent’s Pokémon, he won the match automatically; on another hand, each player could only use one of the following Pokémon per match: , , , and ; finally, in the case a player’s Game Boy ran out of energy, he lost.
The champion was Seok-hyun Kim, a 13 years old boy who was a member of South Korea’s Pokémon Club; on the other hand, 11 years old Soo-chang Jo won the second place and 13 years old In-pyo Lee won the third place. The champion said that he had to practice five hours a day for an entire month to prepare for the tournament. Regarding the prizes, the champion, the runner-up and the third place won a diploma and a Game Boy Player.
The event was a success; however, the lack of Sleep Clause and the possibility of winning by putting an entire team to Sleep was met with criticism by players. Despite the success of the event, there was not another official tournament in South Korea until Gen IV.
File: South Korea Tournament 1.jpeg|The finals of the tournament.
File: South Korea Tournament 2.jpeg|During the final matches, each competitor played on a different TV.
File: South Korea Tournament 3.jpg|The winners of the event: Soo-chang Jo, Seok-hyun Kim and In-pyo Lee.
==Generation III==
===In the games===
====Pokémon Ruby and Sapphire====
 introduced Double Battles, where each player battles with two Pokémon at a time. In Double Battles, certain attacks affect multiple Pokémon and certain Abilities, such as and , only take effect in Double Battles. This format has been used in almost every tournament since the one held in Pokémon Festa 2004 and is the main format in the story modes of Pokémon Colosseum and Pokémon XD: Gale of Darkness. 
In the Cable Club, four players can play a Double Battle variant called the Multi Battle. Similar to Pokémon Stadium, each player can only select and control three Pokémon at a time. 
Pokémon Ruby and Sapphire featured a similar to . However, only two divisions are available: the Level 50 and the Level 100 division. Also, Double Battles can not be conducted.
====Pokémon Colosseum====
In Pokémon Colosseum, the Stadium Cups were replaced with Colosseums. While the general clauses remain from the Pokémon Stadium series, the Colosseums have no special rules in place, with the exception of level divisions. Each Colosseum can be challenged in a single or Double Battle format.
Pokémon Colosseum also introduced Poké Coupons, which are rewarded to the player upon completing portions of Mt. Battle. Poké Coupons can be traded in for various TMs or items; however, the player receives a 15% penalty for each legendary Pokémon used.
Division 	 	 	 	 	
Level 50 	Yes	Yes	Yes	Yes	No
Level 100	No 	No 	No 	Yes	Yes
====Pokémon FireRed and LeafGreen====
In these games, a Battle Tower is not present; instead, Trainer Tower took its place. 
While the Battle Tower values winning streaks, Trainer Tower prioritizes speed. In the Japanese version, players can scan e-Cards to change the floor layouts; in international versions, the e-Reader support was removed, and many of the card layouts were incorporated into the Tower. 
Trainer Tower features four modes of play: Singles, Doubles, Knockout, and Mixed. In a Knockout Battle, the player has to defeat three Trainers in a single battle consecutively. The Mixed mode incorporates battles from the other three layouts.
Unlike the Battle Tower, no clauses are in effect, items can be used from the Bag, and the player can interrupt their challenge to use the Pokémon Center in the lobby at any time. 
In addition, a special battle format is present in the Union Room. Each Trainer can select two Pokémon up to Level 30 in a Single Battle format.
====Pokémon Emerald====
Pokémon Emerald introduced the first . In addition to the Battle Tower, it features six other facilities with special rules, similar to the Stadium Cups. 
Each facility can be challenged in a Single Battle or a Double Battle format. In addition, two players can team up in a Multi Battle format, where each player can control two Pokémon at a time. Players can battle in a Level 50 division or an Open Level division where all of the opponent's Pokémon will be at the same level as the player's highest-leveled Pokémon. 
Unlike the previous Battle Tower, players do not receive items after winning a streak. Instead, players receive Battle Points. Like Poké Coupons, Battle Points can be saved and traded in for certain items or moves; however, there is no penalty for using legendary Pokémon. 
====Pokémon XD: Gale of Darkness====
Unlike , does not feature a Battle Mode. However, after completing the game, the player may challenge the Orre Colosseum, which has similar regulations to the Colosseums in Battle Mode. 
Like almost all of the battles in the game, the Colosseum uses the Double Battle format. 
===In tournaments===
====???====
The first tournament of Generation III took place during Pokémon Festa 2003. Unlike previous Japanese tournaments, two divisions were available: a Level 50 and a Level 100 Division. The tournament used the Single Battle format, and only Pokémon from the Hoenn Pokédex could be used.
====???====
The following tournament took place at Pokémon Festa 2004. This tournament used the Double Battle format. Unlike single battles, each player selected four Pokémon for battle. In addition to the previous rules, new restrictions were placed on nicknames: no vulgarities are to be used nor any Pokémon could be named after another Pokémon (e.g. a Smeargle nicknamed "KYOGRE"). 
As were released earlier that year, almost all of the Pokémon in the National Pokédex were available for use.
====???====
The tournament of Pokémon Festa 2005 featured nearly identical restrictions; however, and were also banned.
====Pokémon Masters 2005====
, Pokémon Masters 2005 was organized by French fansites and sponsored by the likes of Nintendo and Bandai.
====Pokémon Emerald Ultimate Frontier Brain Battle====
A small competition called the Pokémon Emerald Ultimate Frontier Brain Battle took place in 2005 to commemorate the international release of .
The tournament used the Single Battle format. Unlike other Generation III tournaments, all items were banned. 
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Following the Pokémon Emerald Ultimate Frontier Brain Battle, another North American tournament took place during the Journey Across America tour in 2006 commemorating Pokémon's 10th anniversary.
The rules were similar to the Pokémon Festa 2004 rules; however, only event Pokémon were banned. 
==Generation IV==
===In the games===
====Pokémon Diamond and Pearl====
In , six Cups were introduced for wireless battles in the Pokémon Colosseum Club Colosseum, many of which are similar to those in the Pokémon Stadium series. In addition, players can set the levels of all Pokémon to 50 or 100 during Wi-Fi battles. 
Mix Battles were also introduced, wherein players swap one Pokémon with each other from a team of three, then battle.
Unlike Pokémon Emerald, Diamond and Pearl does not have a Battle Frontier, only a . In addition, a level cap of 50 is established.
====Pokémon Battle Revolution====
Colosseums made their return in Pokémon Battle Revolution; however, like the Stadium Cups, each Colosseum features a special rule. Each battle takes place in a Level 30 or a Level 50 mode, and can eventually be challenged in a Single or a Double Battle format. Players may use Rental Passes or Custom Passes in any Colosseum except for the Gateway Colosseum, which restricts the player to Rental Passes. 
Under Colosseum battles, the sleep, freeze, species, item, and self-KO clauses are followed.
In addition, Pokémon Battle Revolution features a mode of online play against random players, a system that eventually carried on to Pokémon Black and White. Battles can be conducted in a single or Double Battle format, with each player selecting three or four Pokémon before battle. All Pokémon are set to level 50, Pokémon nicknames are not used, and Trainer quotes are set to default. Other than that, there are no further restrictions.
====Pokémon Platinum====
As with Pokémon Emerald, a new incorporated the Battle Tower and added four other battle facilities: the Battle Factory, Battle Arcade, Battle Castle, and Battle Hall. Each facility has a set of rules to be followed, all depending on the format of battle selected.
====Pokémon HeartGold and SoulSilver====
Flat Battle mode was introduced in HeartGold and SoulSilver at the Pokémon Communication Club Colosseum. Regardless of rule set, all Pokémon are set to level 50 for the duration of the battle. The exact same Battle Frontier from Pokémon Platinum also made a return.
===In tournaments===
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The first tournament for Generation IV took place in Pokémon Festa 2006, wherein Pokémon only found in the original Sinnoh Pokédex were eligible. No Pokémon are allowed to hold Soul Dew, which remained a banned item throughout all Generation IV competitions from 2006 to 2010.
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The Pokémon Festa 2007 tournament featured similar rules; however, Pokémon outside of the Sinnoh Pokédex were eligible. 
====Pokémon Video Game Showdown 2008====
The Pokémon Video Game Showdown 2008 took place in the in-game Double Cup. For the first time it implemented the Junior and Senior age divisions on Pokémon Video Game tournaments that were originally from the TCG tournaments, so younger players would have a fairer chance on competition.
====Pokémon Video Game Championships 2009====
In 2009, the Pokémon Video Game Championships were included in the yearly Pokémon World Championships, which previously only featured the TCG. In the Video Game World Championships for 2009, players could only use , and the alternate forms introduced in Platinum were ineligible. The Double Cup rules were reinstated. could not be used unless players used an event Dragonite given out at level 50.
====Pokémon Video Game Championships 2010====
In 2010, powerful legendary Pokémon such as were allowed once again in the 2010 World Championships. These Pokémon, referred to as special Pokémon, were limited to two per battle, but four were allowed per team. Event-only Pokémon such as were still banned. 
The tournament used only , and the rules followed the GS Cup rule set found in Flat Battle mode. All Pokémon above level 50 were leveled down to 50, while Pokémon below level 50 would retain their levels. This meant that non-event and could now compete. While Item Clause was in effect, players could switch items between Pokémon in-between games.
==Generation V==
===In the games===
====Pokémon Black and White====
 introduced Triple Battles, Rotation Battles, and the Wonder Launcher were introduced, the last of which is only available on multiplayer. As with the introduction of Double Battles, these introduced a new set of rules to be followed when battling under these formats.
Black and White also brought about the Pokémon Global Link, with the Global Battle Union alongside it. Accessible in Pokémon Centers is the new Random Matchup mode wherein players may face random opponents over Nintendo Wi-Fi Connection without Friend Codes. Any type of battle may be selected. Random Matchup follows its own set of rules for every format available, which updates at times. It also presents a ranking system, with worldwide ranks available on the Global Battle Union section of the Global Link.
===In tournaments===
====Global Battle Union tournaments====
The Global Battle Union hosts its own tournaments via the Battle Competition option on the game menu, and acts similarly to Random Matchup. These tournaments are participated entirely through Wi-Fi connection, and randomly match the player with an opponent. Players are not eliminated, but instead lose points for losing. Each tournament can be joined by anyone with the appropriate region set on their accounts on the Global Link if there is space, and these tournaments each have their own set of rules. All Pokémon used must be placed in the .
====Pokémon Video Game Championships 2011====
The 2011 Video Game Championships became the venue for the first Generation V tournament. As with the first tournaments of Generation III and Generation IV, only Pokémon in the Unova Pokédex may be used. The tournament continued to use the Double Battle format, and due to a glitch was banned in this format.
====Pokémon Video Game Championships 2012====
For the Pokémon Video Game Championships 2012, all Pokémon from the National Pokédex may be used rather than only those in the Unova Pokédex, but there are still some banned Pokémon. Most of the rules remain unchanged from the previous year, with the only difference with being banned.
==References==
==Exernal links==
* International Pokémon Video Game Championships website
* List of Nintendo Cup 2000 finalists
* List of official battle rules (Japanese)
* Pokémon Festa 2004 Finals
* Pokémon Festa 2005 Finals
* Pokémon Festa 2006 Finals
* Video Game Championship 2010 Finals
* Smogon's Introduction to Competitive Play
Category:Game mechanics
Category:Pokémon meta
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