Editing Robot-sumo (section)

== Tournaments ==
Currently, several Robot-Sumo tournaments are held around the world. Robot-sumo competitions range from simple didatic and educational tournaments within schools to the highest level engineering competitions between high school/university students, graduate engineers and [[Hobby|hobbyists]].

Competitors are usually organized into teams, consisting of the sumo robots themselves and the members responsible for their creation, operation and maintenance during the event. Robot-sumo tournaments still have [[amateur]] status (students and [[Hobby|hobbyists]]), even though some teams from academic institutions might be guided or leaded by a [[professor]] from the institute, with this advisoring being commonly included as part of his academic activities.<ref>{{Cite web |last=apis3 |title=Equipe Kimauánisso, do Instituto Mauá de Tecnologia, conquista 15 troféus na RoboCore Experience |url=https://maua.br/noticias/press-releases/equipe-kimauanisso-do-instituto-maua-de-tecnologia-conquista-15-trofeus-na-robocore-experience |access-date=2025-01-06 |website=maua.br |language=pt-br}}</ref>

Competitions adopt different competition formats, usually knockout bracket [[Tournament|competitions]], ranging from [[Single-elimination tournament|single elimination]] systems to tournaments with group stage or [[Double-elimination tournament|double elimination]] systems. Teams may register more than one robot per event, and confrontations between robots from the same team are possible.<ref name=":3" /><ref name=":4" />

As for the highest level competitions, Japan is the world's leading powerhouse in this category, and the [[:ja:全日本ロボット相撲大会|All Japan Robot-Sumo Tournament]] is the most prestigious competition in the world, being considered as the "World Robot-Sumo Championship".<ref name=":7" /> Originally a tournament for Japan-based builders, FUJISOFT currently approves several tournaments around the world as certified overseas qualifiers for international competitors.<ref name=":1" />

In Japan, a large portion of the top competitors come from school teams from [[Secondary education in Japan|secondary school]], with tournaments being exclusively held for them. Furthermore, the high school regional qualifiers make up a significant portion of the japanese slots for the All Japan Grand Final.<ref>{{Cite web |title=大会結果｜ここに歴史あり｜全日本ロボット相撲大会 - ALL JAPAN ROBOT-SUMO TOURNAMENT |url=https://www.fsi.co.jp/sumo/history/record/index.html |access-date=2025-01-20 |website=www.fsi.co.jp}}</ref> In 2024, 66 of the 114 slots for japanese competitors were reserved for high schooler's robots.<ref name=":23" />

Also in Asia, there are also important competitions in China, such as the RobotChallenge,<ref name=":5">{{Cite web |title=首页-RobotChallenge |url=http://robotchallenge.org.cn/ |access-date=2024-12-31 |website=robotchallenge.org.cn}}</ref> and in Mongolia.<ref name=":8" />

In Europe, the RoboChallenge, in Romania, is the main european robot-sumo event, focused mainly on autonomous sumo.<ref name=":28">{{Cite web |title=Robochallenge - Index |url=http://bfrz.ro/en |archive-url=http://web.archive.org/web/20221130072705/http://bfrz.ro/en |archive-date=2022-11-30 |access-date=2024-12-31 |website=bfrz.ro |language=en}}</ref> [[Baltic states|Baltic States]] also organize relevant competitions, such as Robotex.<ref>{{Cite web |title=Robotex International - The biggest robotics festival |url=https://robotex.international/ |access-date=2025-01-26 |website=Robotex International |language=en-US}}</ref>

In the Americas, the former [[RoboGames]], the largest robotics competition in the world at the time, included several Sumo categories in its program, bringing together international competitors from all over the world.<ref name=":15" /> Mexico, one of the world powerhouses, especially in Mega Sumo RC and Mini Sumo, hosts several robot-sumo competitions.<ref name=":8" /> In Brazil, RoboCore hosts and sanctions the main robot competitions of the country, mainly for [[Robot combat|Robot Combat]], but which usually include Robot-Sumo and other events such as Line Follower as well.<ref name=":3" />

=== Japan ===
In Japan, Robot-Sumo is officially sanctioned by FUJISOFT Inc., which organizes the All Japan Robot-Sumo Tournament, the first robot-sumo competition, since 2008 the world's leading competition with robots from over 20 countries participating,<ref name=":1" /> and currently, considered as the "World Robot-Sumo Championship".<ref name=":7" />

Robot-sumo in Japan is also particularly popular among students from the [[Secondary education in Japan|secondary school]]. There are two main tournaments for high schooler's builders: the High Schooler's Robot-Sumo Tournament, organized by FUJISOFT, and the High School Robot-Sumo Championship, organized by AEON Mall, with the support of FUJISOFT, which are also qualifiers to the All Japan Tournament. 

==== All Japan Robot-Sumo Tournament ====
{{Infobox tournament|name=All Japan Robot-Sumo Tournament
全日本ロボット相撲大会|game=Robot-Sumo:
- Mega Sumo (Auto and RC)
- Mini Sumo (Auto and RC)|established=1989|administrator=FUJISOFT Inc.|format=Overseas Tournaments: Various
Regional Stage: Single-elimination knockout system
Grand Final: Single-elimination knockout system|venues=Overseas Tournaments: Various outside Japan
Regional Stage: Various in Japan
Grand Final: Ryōgoku Kokugikan, Sumida, Tokyo, Japan|broadcast=Youtube: https://www.youtube.com/@ROBO-SUMO/streams|website=https://www.fsi.co.jp/sumo/index.html}}The All Japan Robot Sumo Tournament <small>[<nowiki/>[[:ja:全日本ロボット相撲大会|jp]]]</small> (Japanese: 全日本ロボット相撲大会 zen'nippon robotto sumou taikai), organized by FUJISOFT Inc. <small>[<nowiki/>[[:ja:富士ソフト|jp]]]</small>, is the official national robot-sumo tournament of [[Japan]]. Founded in 1989, the event is the first robot-sumo event ever, introducing the Mega Sumo class. Since the introduction of overseas participants in 2008, it is considered the "World Robot-Sumo Championship" <ref name=":7" /> for Mega Sumo, both Auto and RC. Since 2023, it has also been officially hosting Mini-Sumo competitions (Auto and RC).<ref name=":1" />  

Currenlty, the competition is divided into a "Regional Stage" (Japanese: 地区大会 chiku taikai, [[Literal translation|lit]]: regional tournament) and the "Grand Final"  (Japanese: 全国大会 zenkoku taikai,  [[Literal translation|lit]]: all country tournament), also called "Final Round". The Regional Stage consists of regional tournaments held in Japan between August and October for participants based in Japan, with the top performers from each tournament qualifying for the Grand Final. The Regional Stage tournaments have usually been the [[Kantō region|Kantō]], [[Chūgoku region|Chūgoku]]-[[Shikoku]], [[:ja:北信越地方|Hokushin'etsu]]-[[Tōkai region|Tōkai]], [[Tōhoku region|Tōhoku]], [[Hokkaido|Hokkaidō]], [[Kansai region|Kinki]] and [[Kyushu|Kyūshū]] tournaments, though not all of them may be held every edition. The Regional Stage tournaments currently adopt a single-elimination format and are held in a single day.<ref name=":18">{{Cite web |title=ロボット相撲大会｜全日本ロボット相撲大会 - ALL JAPAN ROBOT-SUMO TOURNAMENT |url=https://www.fsi.co.jp/sumo/tournament/index.html#page1 |access-date=2025-01-19 |website=www.fsi.co.jp}}</ref> The FUJISOFT's "High Schooler's Tournament" and the "High School Championship" Regional Stage tournaments are also part of regional qualifiers for the All Japan Grand Final.<ref name=":23">{{Cite web |date=2024-12-02 |title=12月7日（土）、8日（日）、全日本ロボット相撲大会2024 決勝大会 “世界一のロボット横綱”を目指して、ロボット力士が両国国技館に集結！ |url=https://prtimes.jp/main/html/rd/p/000000127.000061382.html |access-date=2025-01-22 |website=プレスリリース・ニュースリリース配信シェアNo.1｜PR TIMES |language=ja-JP}}</ref>  

International representatives may qualify for the Grand Final through international qualifiers tournaments approved by FUJISOFT, in overseas countries such as [[Mexico]], [[Mongolia]] and [[Brazil]], among others. These tournaments form the "Overseas Tournaments" qualifiers (Japanese: 海外大会枠 kaigai taikai-waku, [[Literal translation|lit]]: overseas tournaments slots).<ref name=":21">{{Cite web |title=ロボット相撲大会｜全日本ロボット相撲大会 - ALL JAPAN ROBOT-SUMO TOURNAMENT |url=https://www.fsi.co.jp/sumo/tournament/index.html |access-date=2024-12-31 |website=www.fsi.co.jp}}</ref> The Overseas Tournaments are run by different organizations, so the tournament format varies. In some specific cases, qualification certificates are also issued to some teams as "National Representative" or "Country Representative", for countries with no teams yet qualified or without any official qualifier tournament.<ref name=":31" />  

The following countries are listed as having already collaborated with All Japan Robot-Sumo Tournament, regarding participation in the tournament or other types of collaboration in robot-sumo:<ref>{{Cite web |last=FUJISOFT Inc. |title=About {{!}} World Map |url=https://www.fsi.co.jp/sumo/robot/en/about.html#World |access-date=2025-04-18 |website=www.fsi.co.jp}}</ref>

* [[Africa]]: [[Democratic Republic of the Congo|DR Congo]], [[Egypt]] and [[Tunisia]].
* [[Asia]]: [[China]], [[Indonesia]], [[Israel]], [[Lebanon]], [[Malaysia]], [[Mongolia]], [[Philippines]], [[Saudi Arabia]], [[Singapore]] and [[Thailand]].
* [[Americas]]: [[Argentina]], [[Brazil]], [[Canada]], [[Chile]], [[Colombia]], [[Ecuador]], [[Mexico]], [[Paraguay]], [[Peru]] and the [[United States]].
* [[Europe]]: [[Estonia]], [[France]], [[Latvia]], [[Lithuania]], [[Poland]], [[Russia]], [[Spain]] and [[Turkey]].

The Grand Final is held in December in [[Tokyo]], [[Japan]] at the [[Ryōgoku Kokugikan]],<ref name=":1" /> and is held in two days, with the first day labeled "Qualification Session" and the final day as the "Grand Final Session" properly.<ref name=":22" /> The Grand Final is also a single-elimination knockout tournament.<ref name=":18" />

Between 2013 and 2017, FUJISOFT split the All Japan Grand Final in the "International Robot-Sumo Tournament", a tournament which functioned as the current Grand Final and a proper world championship in name {{NoteTag|Originally the "International Robot-Sumo Tournament 2013" was considered a test event, and was originally called the "International Robot-Sumo Pre-Tournament 2013". Currently, It is listed as part of the International Robot-Sumo Tournament without the status of a "test event".|name=Status of the International Robot-Sumo Tournament 2013}}, and the All Japan Tournament properly, which was reserved for japanese competitors and functioned as the japanese qualifier for the International (similar as other overseas tournaments).<ref name=":16" /><ref name=":25" /> In 2018, FUJISOFT reunified the competition under the name All Japan Grand Final, which once again functioned as the de facto world championship tournament (even with the "All Japan" in name).<ref name=":30" />  

As of 2024, FUJISOFT initially reserved for the All Japan Grand Final, for each of Mega Sumo categories, Auto and RC, a total of 57 slots for the Regional Stage (including the "High Schooler's Tournament" and the "High School Championship" Regional Stage tournaments) and 40 slots for Overseas Tournaments.<ref name=":21" /> While all japanese slots were filled, only 26 and 23 slots were filled by overseas representatives for Auto and RC, respectively. That edition had robots from 17 overseas countries qualified.<ref name=":23" />

==== High Schooler's Robot-Sumo Tournament ====
FUJISOFT also organizes the "High Schooler's Robot-Sumo Tournament" (Japanese: 高校生ロボット相撲大会 kōkōsei robotto sumou taikai). The tournament is exclusive for robots developed by students from [[secondary education in Japan]] (equivalent to [[Secondary school|high school]]) held in parallel with the main [[Robot-sumo#All Japan Robot-Sumo Tournament|All Japan Robot Sumo Tournament]] <small>[<nowiki/>[[:ja:全日本ロボット相撲大会|jp]]]</small>. Like the main All Japan, while initially a Mega Sumo tournament only, the event currently also hosts Mini Sumo tournaments.<ref name=":24">{{Cite web |title=ホーム |url=https://robot-sumo.net/ |access-date=2025-01-19 |website=公式）高等学校ロボット相撲選手権 |language=ja}}</ref><ref>{{Cite web |title=ごあいさつ｜全日本ロボット相撲大会 - ALL JAPAN ROBOT-SUMO TOURNAMENT |url=https://www.fsi.co.jp/sumo/greeting/index.html |access-date=2024-12-31 |website=www.fsi.co.jp}}</ref>

The tournament also consists of Regional Stage tournaments and a Final tournament, with the Regional Stage tournament being usually held jointly with the All Japan Regional Stage tournaments in the same day, while the Final High Schooler's tournament is usually held separately and earlier, in a different venue.<ref name=":18" /> The tournaments also adopt single-elimination format, with the final tournament with 32 robots in each Mega Sumo Auto and RC categories.<ref name=":13" />

The Regional Stage tournaments are also usual qualifiers for the main All Japan Robot-Sumo Tournament Grand Final.<ref name=":23" />

==== High School Robot-Sumo Championship ====
AEON Mall, with the support of FUJISOFT, organizes the "High School Robot-Sumo Championship" (Japanese: 高等学校ロボット相撲選手権 kōtō gakkō robotto sumou senshuken), which is also exclusive to students from [[secondary education in Japan|secondary education]]. Initially a Mega Sumo tournament, the event currently also hosts Mini Sumo class tournaments.<ref name=":24" />

The tournament consists of Regional Stage tournaments only, usually hosted in AEON Mall shopping centres from each host region.<ref name=":24" />

These Regional Stage tournaments are also usual qualifiers for the main [[Robot-sumo#All Japan Robot-Sumo Tournament|All Japan Robot Sumo Tournament]] <small>[<nowiki/>[[:ja:全日本ロボット相撲大会|jp]]]</small> Grand Final.<ref name=":23" />

=== Brazil ===
Widely known for [[robot combat]] competitions, robot-sumo was introduced in [[Brazil]] by RoboCore in 2008 <ref name=":19" /> and has attained increasing attention in the country from 2017 onwards, mainly from teams from the top [[Universities and higher education in Brazil|universities]] of the country. Robot-Sumo has been added to the main robotics competitions contested by teams of engineering and technology students from institutes at [[Education in Brazil#Technical education (ensino t%C3%A9cnico)|Technical]] and mainly at [[Higher education Brazil|Higher Education]] levels.<ref>{{Cite web |title=Combate de Robôs no Brasil {{!}} RoboCore |url=https://www.combatederobos.com.br/en |access-date=2025-03-14 |website=combatederobos |language=en}}</ref> Since these teams are mostly students organizations/clubs or research groups, the rotation of members tend to be high, since every year new freshmen get into the school/university, and senior members tend to leave the group after graduation. These teams usually have a [[professor]] from the institute as an advisor, who may contribute for the robots development directly, or be just an representative for internal bureaucracy.

The robotics teams from the [[Polytechnic School of the University of São Paulo|Polytechnic School of the]] [[University of São Paulo]] ([[Polytechnic School of the University of São Paulo|Poli-USP]]), with their team named "ThundeRatz" <small>[<nowiki/>[[:pt:ThundeRatz|pt]]]</small>,  [[Instituto Mauá de Tecnologia]], with their team named "Kimauánisso", and [[Federal University of Rio de Janeiro]] (UFRJ), with their team named "Minervabots", are among the most prominent and successfull robot-sumo teams in the country.<ref>{{Cite web |title=ThundeRatz participa do Mundial de Robótica no Japão – ESCOLA POLITÉCNICA |url=https://www.poli.usp.br/noticias/2675-thunderatz-participa-do-mundial-de-robotica-no-japao.html |access-date=2025-01-19 |language=pt-BR}}</ref><ref>{{Cite web |title=Instagram - É HOJE! Finalmente chegamos ao Japão para competir na @alljapanrobotsumo !! |url=https://www.instagram.com/p/DDPfCvzuYFL/ |access-date=2025-01-19 |website=www.instagram.com}}</ref>[[File:Stonehenge-ThundeRatz.jpg|thumb|Stonehenge, former Mega Sumo RC developed by ThundeRatz <small>[<nowiki/>[[:pt:ThundeRatz|pt]]<nowiki>]</nowiki></small>.<ref name=":9" /><ref name=":14">{{Cite web |title=Stonehenge Robot - ThundeRatz Team » JSumo |url=https://blog.jsumo.com/thunderatz-team-stonehenge-sumo-robot/ |access-date=2025-01-03 |website=blog.jsumo.com}}</ref> Though untypical worldwide, its design was heavily copied by rival teams in Brazil during its active years (2012-2020). As of the IRONCup 2025, it was still the biggest [[:pt:Resultados_das_Competições_de_Sumô_de_Robôs_da_RoboCore|Sumo 3kg RC RoboCore champion]] and the leader of the History Ranking.<ref name=":262">{{cite web|access-date=2025-02-25 |title=Robot Ranking |url=https://rank.robocore.net/sumo-3kg-rc |website=rank.robocore.net}}<!-- auto-translated from Portuguese by Module:CS1 translator --></ref> ]]These competitions are also open to teams not directly linked with academic institutions, including independent teams of [[Hobby#Hobbyists|hobbyists]], graduated engineers and professionals. These teams are often made up of former students from those academic institutions teams.<ref>{{Cite web |title=Time Raijū de Robótica |url=https://www.instagram.com/raiju.team/ |access-date=2025-01-21 |website=www.instagram.com}}</ref><ref>{{Cite web |title=Equipe Paralela |url=https://www.instagram.com/equipeparalela/ |access-date=2025-01-21 |website=www.instagram.com}}</ref>

Furthermore, international participants, from countries such as [[Ecuador]], [[France]], [[Mexico]], [[Paraguay]] and [[Poland]], have already participated.<ref name=":3" /> Participants from Mexico, one of the robot-sumo world powerhouses, have achieved great success in competitions in Brazil, mainly in Mini Sumo.

==== RoboCore ====
RoboCore is an online store, developer and manufacturer of boards and kits in Brazil and an organizer of robotics events.<ref>{{Cite web |last=RoboCore |title=RoboCore // A loja virtual do maker brasileiro |url=https://www.robocore.net/quem_somos |access-date=2025-01-01 |website=RoboCore |language=pt-BR}}</ref> RoboCore organizes and supports a number of robotics competitions in Brazil, including in its program [[Robot combat|Robot Combat]], Line Follower, Robot Trekking and Robot-Sumo events, attracting mainly universitarian and technical education level teams.<ref name=":3" /> The current major RoboCore robotics competition in general is the RoboCore Experience (RCX, and former Winter/Summer Challenge), the largest [[robot combat]] competition in [[Latin America]], currently held with [[Campus Party]] Brasil.<ref name=":2" /> 

Currently, the annual calendar competitions from RoboCore with robot-sumo added to their program are the following:<ref name=":3" />

* '''RoboCore Experience (RCX)''': organized by RoboCore, currently held with [[Campus Party]] Brasil. It is usually held at the [[São Paulo]] - [[São Paulo (state)|SP]] edition, which is usually held in July, but it may be hosted in other editions.
* '''IRONCup''': organized by [[Inatel]] and sanctioned by RoboCore, held at [[Santa Rita do Sapucaí]] - [[Minas Gerais|MG]], usually around February/March.
* '''RSM Challenge''': organized by Instituto RSM and sanctioned by RoboCore, held at [[Mogi das Cruzes]] - [[São Paulo (state)|SP]], in the [[Greater São Paulo]], usually around April/May.
* '''RoboChallenge Brasil''': organized by [[Instituto Mauá de Tecnologia]] and sanctioned by RoboCore, held at [[São Caetano do Sul]] - [[São Paulo (state)|SP]], in the [[Greater São Paulo]], usually in October.

The robot-sumo competitions organized or supported by RoboCore are among the most prestigious in the country. RoboCore Experience is the major robotics event in Brazil and considered by many as the brazilian robotics "National Championship". However, the IRONCup, the RSM Challenge and the RoboChallenge Brasil have also become prominent competitions due to their relevance to the brazilian robot-sumo scenario. The RSM has also become prominent as a major international tournament, gathering robots from [[Latin America]] countries, such as [[Mexico]], [[Ecuador]], [[Colombia]] and so on.<ref name=":3" /> Besides these events, some special and once a time competitions might be organized as well.

The classes usually included in RoboCore tournaments program are Sumo 3kg (Mega Sumo) Auto and RC, Mini Sumo Auto and RC and LEGO Sumo. In addition, there is usually a separate LEGO Sumo class exclusively for teams formed by [[Education in Brazil#Elementary school (ensino fundamental)|elementary]] and [[Education in Brazil#High school (ensino m%C3%A9dio)|high school]] students, the LEGO Sumo Junior.<ref name=":3" />
[[File:SumôRobô-ThundeRatz.jpg|thumb|330x330px|Mega Sumo (Sumo 3kg) match between [[Polytechnic School of the University of São Paulo|Poli-USP]] (in the left) and [[Federal Center for Technological Education of Minas Gerais|CEFET-MG]] (in the right) at the RoboCore Winter Challenge 2017.|left]]
RoboCore tournaments usually adopt the [[Double-elimination tournament|double-elimination knockout system]], in which there is a main bracket (called the "winners' bracket") and a secondary bracket of robots transferred after losing a match in the main bracket (called the "losers' bracket"). Robots that lose in the losers bracket are eliminated from the tournament. The tournament final consists of the winner of the winners' bracket competing against the remaining robot from the losers' bracket. Robot-sumo tournaments from RoboCore usually adopt a "double final" format, in which the robot coming from the losers' bracket must win two matches of the final to become the tournament champion, while the robot coming from the winners' bracket must win only one match. This is due to the principle that for a robot to be eliminated, it must suffer two defeats in the event. 

RoboCore calendar robot-sumo events (RCX, IRONCup, RSM Challenge and Robochallenge) have been usually approved by FUJISOFT as "Overseas Tournaments" qualifiers for the [[Robot-sumo#All Japan Robot-Sumo Tournament|All Japan Robot Sumo Tournament]] <small>[<nowiki/>[[:ja:全日本ロボット相撲大会|jp]]]</small> in the Mega Sumo and Mini Sumo classes.<ref name=":8" /> Thus, these competitions are the main qualification path for teams based in Brazil.

RoboCore also organizes the "RoboCore's Robot History Ranking", a historical ranking of registered and participant robots in RoboCore tournaments, including those in the robot-sumo classes. The system is based on the [[Elo rating system|Elo system]] that calculates the relative strength between opponents based on the result of each confrontation. The RoboCore system adopts an initial score of 1200,<ref>{{cite web|access-date=2025-02-25 |title=Robot Ranking |url=https://rank.robocore.net/about |website=rank.robocore.net}}<!-- auto-translated from Portuguese by Module:CS1 translator --></ref> but does not exclude inactive robots from the ranking. Since the system is tied to a registered robot, then the ranking is compiled exclusively for each instance registered in the system (this means if a robot is registered with different labels for different tournaments, the ranking will be compiled for each label, as different robots). For robot-sumo, the RoboCore ranking is compiled for the major classes in Brazil: Sumo 3kg Auto, 3kg RC, Mini Auto, Mini RC, LEGO and LEGO Jr., but also for minor classes, such as the remote classes, popular during the [[COVID-19 pandemic]].

==== Other tournaments in Brazil ====
Though RoboCore organizes and sanctions a number of events, most of them are hosted in the [[Southeast Region, Brazil|Southeast]] region of Brazil, mainly in the [[São Paulo (state)|São Paulo state]]. Different academic institutions have also been organizing regional tournaments, mainly in the [[Northeast Region, Brazil|Northeast]] and [[South Region, Brazil|South]] regions of Brazil.

From 2017 until 2021, [[Instituto Mauá de Tecnologia|Instituto Mauá]] also organized additional tournaments in São Paulo state in partnership with [[:pt:Serviço_Social_do_Comércio|SESC]], from [[Santo André, São Paulo|Santo André]] in the [[Greater São Paulo]], and with [[Bosch (company)|Bosch]] Brazil in [[Campinas]] - [[São Paulo (state)|SP]]. These tournaments were also added as Overseas Tournament qualifiers for the All Japan Robot-Sumo Tournament.

=== China ===
[[China]] hosts the RobotChallenge.<ref name=":5" />

==== RobotChallenge ====
The RobotChallenge is "one of the world’s largest artificial intelligent robotic championships" and had the participation of more than 80 countries through the years.<ref name=":5" /> The competitions hosts a number of robotics competition such as Air Race, Line Follower, Humanoid Sprint and RoboSumo (Robot-Sumo). <ref name=":5" />

For Robot-sumo, the competition organizes tournaments for Mega Sumo, Mini Sumo, Micro Sumo, Nano Sumo and Lego Sumo classes. <ref name=":27">{{Cite web |title=相扑赛-RobotChallenge |url=http://www.robotchallenge.org.cn/competition-RobotSumo.html |access-date=2025-01-02 |website=www.robotchallenge.org.cn}}</ref> There is also a special class for Humanoid Sumo.

RobotChallenge is also a usual Overseas Tournament qualifier for the All Japan Robot-Sumo Tournament. <ref name=":8" />

=== Mexico ===
[[Mexico]] hosts a number of robot-sumo events. The prominent ones are usual approved Overseas Tournaments qualifiers for the All Japan Robot-Sumo Tournament.<ref name=":8">{{Cite web |title=Instagram - ALL JAPAN ROBOT SUMO |url=https://www.instagram.com/p/C-X-fwuKRkB/ |access-date=2025-01-02 |website=www.instagram.com}}</ref>

=== Mongolia ===
[[Mongolia]] hosts a number of robot-sumo events. The prominent ones are usual approved Overseas Tournaments qualifiers for the All Japan Robot-Sumo Tournament.<ref name=":8" />

=== Romania ===
[[Romania]] hosts the Robochallenge.<ref name=":20">{{Cite web |title=Robochallenge 2024 |url=https://robochallenge.ro/ |access-date=2025-01-02 |website=robochallenge.ro}}</ref>

==== Robochallenge ====
Robochallenge was first organized in 2008, and initially called ROBOT FOTBAL, hosting a Robot Football competition. <ref>{{Cite web |title=Robochallenge 2024 |url=https://robochallenge.ro/history/robochallenge-2008 |access-date=2025-01-02 |website=robochallenge.ro}}</ref> It currently organizes tournaments of Line Follower, Robot Football, Maze, [[Robot combat|Robot Combat]] and Robot-Sumo, among others.<ref name=":6">{{Cite web |title=Robochallenge 2024 |url=https://robochallenge.ro/regulation |access-date=2025-01-02 |website=robochallenge.ro}}</ref> The competition is held at [[Politehnica University of Bucharest|Politehnica of Bucharest]]. <ref>{{Cite web |title=Robochallenge 2024 |url=https://robochallenge.ro/contact |access-date=2025-01-02 |website=robochallenge.ro}}</ref>

As of 2024, the robot-sumo classes hosted by Robochallenge Romania are Mega Sumo, Mini Sumo, Micro Sumo, Nano Sumo.<ref name=":6" /> It also organizes a Humanoid Sumo competition.

Robochallenge is an also usual Overseas Tournament qualifier for the All Japan Robot-Sumo Tournament. <ref name=":8" />

=== United States ===
The [[RoboGames]] is held in the [[United States|USA]],<ref>{{Cite web |title=RoboGames! (formerly ROBOlympics) |url=https://robogames.net/index.php |access-date=2025-01-03 |website=robogames.net}}</ref> which was, until 2016, the largest open robotics competition in the world. <ref>{{Cite news |date=2016-04-27 |title=Robotics tournament VEX Worlds is named largest in the world after 1,075 teams take part |url=http://www.guinnessworldrecords.com/news/2016/4/robotics-tournament-vex-worlds-is-named-largest-in-the-world-after-1-075-teams-ta-426576 |archive-url=http://web.archive.org/web/20240614003154/https://www.guinnessworldrecords.com/news/2016/4/robotics-tournament-vex-worlds-is-named-largest-in-the-world-after-1-075-teams-ta-426576 |archive-date=2024-06-14 |access-date=2025-01-03 |work=Guinness World Records |language=en-GB}}</ref>

==== RoboGames ====
{{Main|RoboGames}}
RoboGames is an international robot event contested annually in the USA. The events are divided in categories: Humanoids; Auton. Humanoid Challenges; [[Robot combat|Combat]]; Robot Soccer; Open; Jr League; Autonomous Autos; Art Bots; BEAM, and Sumo. <ref name=":12" /> It hosted the first robot-sumo event outside Japan, in 1998. <ref name=":7" />

As of 2024, RoboGames opened registrations for the following robot-sumo events: Nano 25g (auton), Micro 100g (auton), Mini 500g (auton), Mini 500g (junior class), 1kg (kit-auton), Mega 3kg (R/C), Mega 3kg (auton), 4kg (Humanoid). <ref name=":12">{{Cite web |title=RoboGames Event Schedule and Rules |url=https://robogames.net/events.php |access-date=2025-01-03 |website=robogames.net}}</ref>

RoboGames is an also usual Overseas Tournament qualifier for the All Japan Robot-Sumo Tournament. <ref name=":8" />