The tournament was established in order for karate dojos to compete against each other.
The tournament first debuted sometime around 1968. The Cobra Kai Dojo began competing late 1970s (possibly 1979) and managed to win the tournament 4 times between then and 1983, with their most notable champion being Cobra Kai star Johnny Lawrence in both 1982 and 1983.
In 1984, Daniel LaRusso makes enemies with Johnny and his friends at Cobra Kai. When it is agreed that Daniel will compete against the Cobra Kai's in the All Valley tournament, Miyagi (maintenance man in Daniel's apartment complex) trains him. Daniel enters the tournament as a newcomer, while Johnny enters as the two time defending champion. Daniel defeats Johnny in the finals with the crane kick to the face, to become the next champion.
Although not held, the aftermath from the 1984 Tournament is shown as Cobra Kai's sensei John Kreese destroys Johnny's 2nd-place trophy and attempts to choke him, only to be stopped and defeated by Miyagi. Johnny and the rest of the students likely resign from Cobra Kai following this incident, as they finally realize how cruel and unethical of a man Kreese truly is.
Months following the aftermath of the 1984 tournament, Kreese is revealed to be broke because of having no students in the last several months, but Terry Silver (true founder of Cobra Kai, war buddy, and friend of Kreese) decides to help him get revenge on Daniel and Mr. Miyagi. Daniel wants to fight in the next All Valley in order to defend his title, but Mr. Miyagi requests him not to. While Daniel accepts Mr. Miyagi's request, he is soon brought in by Terry, who tricks him into thinking he wants to train him. However, his true intentions are to make Daniel believe he is strong and during the tournament, Mike Barnes (whom Terry hired) will beat and humiliate Daniel, which will re-popularize Cobra Kai and make everyone enroll, and he'll be able to reopen and run it with Kreese.
Daniel is given a bye to the finals, due to a new rule giving the defending champion an automatic spot in the finals. During the finals, Mike under Silver's order, repeatedly wins a point, but then commits an illegal move, resulting in him losing the point, so that he has more chances to attack Daniel and cause him pain, as Silver wants Daniel to suffer pain rather than just lose. Mike severely injures and terrifies Daniel. However, in the sudden death round Daniel uses the kata technique he learned from Mr. Miyagi to flip Mike and win the tournament for the second year in a row, ending Cobra Kai for good (or so it seems). Cobra Kai is immediately forever banned from competing in the All Valley Tournament after 1985 due to the unscrupulous, abusive, and ungentlemanly conduct of Silver, Kreese, and Barnes.
At some point after the tournament in 1985, The All-Valley Committee permanently bans Cobra Kai from competing in the tournament going forward. In the 32 years between the third film and Cobra Kai, the only known champion is Xander Stone of Topanga Karate who won the tournament in 2017. No champions between 1986-2016 are revealed, though Topanga Karate are implied to have won during that time or an unknown dojo.
Thirty-three years after the 1984 tournament, Johnny, who has been down on his luck since the tournament, decides to re-open Cobra Kai and redeem himself. Johnny trains his students throughout the course of a few months and proceeds to have Cobra Kai unbanned from the All Valley after the events of Part III, much to the dismay of Daniel, who attempts to make the ban last. Cobra Kai is unbanned and the students fight, and eventually, through the challenge of Miguel Diaz and Robby Keene, Cobra Kai wins the tournament, and have a new found popularity. Despite their victory, it turned out that Miguel and a few others used dirty tactics to win.
Though not held, the performances by Miguel and fellow Cobra Kai student Hawk in the tournament, result in several teenagers joining Cobra Kai, and Johnny rebukes and punishes his students, Miguel and Hawk in particular, for their dirty tactics in the tournament.
During the duration of his coma, Miguel is dreaming about fighting an unidentified opponent to defend his title as champion in the All Valley Tournament. In the episode The Good, The Bad, and The Badass, the tournament is canceled by the the city council in light of the karate war at West Valley High School during the episode No Mercy. The decision is ultimately overturned following an appeal hearing heralded by Miguel Diaz and Samantha LaRusso. In the season finale December 19, following a heavy karate fight between Daniel and Kreese, the latter proposes settling the tension in the upcoming tournament.
It is likely that the tournament will be held.
|Cobra Kai (Possibly)||Unknown and unnamed Cobra Kai (possibly)||Unknown||1979||Unknown|
|Cobra Kai (Possibly)||Unknown and unnamed Cobra Kai (possibly)||Unknown||1980||Unknown|
|Locust Valley Karate||Darryl Vidal||Unknown||1981||Unknown|
|Cobra Kai||Johnny Lawrence||Unknown||1982||Unknown|
|Cobra Kai||Johnny Lawrence||Tommy||1983||3-0|
|Miyagi-Do Karate||Daniel LaRusso||Johnny Lawrence||1984||3-2|
|Miyagi-Do Karate||Daniel LaRusso||Mike Barnes||1985||1-0 (Sudden Death)|
|Topanga Karate||Xander Stone||Unknown||2017||Unknown|
|Cobra Kai||Miguel Diaz||Robby Keene||2018||3-2|
- The earliest champion known is Vidal. However, Vidal is not the first person to win.
- In an article about the 1983 All Valley, it stated that Kreese led Cobra Kai to their 4th win, possibly indicating that they won in 1979 and 1980, though the champions in those years are unnamed.
- Johnny and Daniel are currently the only champions to win twice, and in back to back years.
- Daniel and Miguel are the only known champions who are undefeated.