The Dragon Ball Heroes (ドラゴンボール ヒーローズ) are a team of teenagers who are skilled at fighting in the Dragon Ball Heroes World.
When Dr. Auto mistakenly releases Black Smoke Shenron and the evil Shadow Dragons in the world, three of the Shadow Dragons kidnap his grandchildren Nim, Nico, and Genome. To stop the Shadow Dragons and rescue the three kidnapped competitors, the Battle Navigator Tsubasa and the Battle Princess Momo-chan, with help from the Capsule Corporation Engineer Yoshito-kun, decide to reunite a team of teenagers who are skilled at the Dragon Ball Heroes arcade game: Beat, Note, Froze, Kagyu, and Kabra. After a brief training, the team enters into the Dragon Ball Heroes dimension in order to defeat the Shadow Dragons and save the three kidnapped Android avatar players.
In Super Dragon Ball Heroes: World Mission, the Dragon Ball Heroes team is founded in Hero Town by Xeno Trunks in the guise of Great Saiyaman 3, a local celebrity Super Dragon Ball Heroes player known to his fans as the Hero Master. In World Mission, Beat is a novice player who just moved to Hero Town. Sensing something special about him, Great Saiyaman 3 observes Beat's first match at the Hero Stadium and after seeing him play decides to challenge him himself, offering pointers to make it a fair fight due to Bear's inexperience. Beat is a quick study though their battle is interrupted by the sudden appearance of Cooler in Hero Town. Beat follows Great Saiyaman 3 outside and ends up getting attacked by Cooler with a Ki Blast, though Beat somehow instinctively uses his ki to guard himself from the blast outside of the game to Cooler and Great Saiyaman 3's shock. Great Saiyaman 3 kills Cooler with his Burning Slash and afterwards explains that the Cooler they fought escaped the game world due to an anomaly created by a mysterious individual that Great Saiyaman 3 dubs "the menace". Recognizing Beat's potential as both a fighter and SDBH player, he recruits him to join the Dragon Ball Heroes team. Joined by an experienced local player named Note who was also recruited by Great Saiyaman 3, Beat is given his team jacket and both Beat and Note receive their Hero Switches, a bracelet-like device designed by Great Saiyaman 3 and Leggings of the Capsule Corporation to allow players to physically enter the game world taking the form of their Hero Avatar. Wanting to check out Beat's skill as a player after learning he is a newbie, Note convinces Great Saiyaman 3 to let her fight Beat as team building exercise with Great Saiyaman 3 suggesting they do so inside the game world to allow them to test out the Hero Switch at the same time. Great Saiyaman 3 transports them to Gizard Wasteland during the period after Raditz's death when the Dragon Team was still training to confront the Saiyans. After Beat manages to best Note twice in battle, the two become closer as Beat gains Note's respect. After dealing with an anomaly in the same time period that allows Raditz to survive his fight with Goku and Piccolo and allows Vegeta, Raditz, and Nappa to achieve Super Saiyan 3 after Nappa and Vegeta arrive on Earth much earlier, Note and Beat prove themselves capable recruits. The team's base is located in secret the Hero Lab hidden within the Hero Tower of Hero Town with Kang and Kong acting as security who only permit allow team members to enter. Leggings supports the team as technician while Great Saiyaman 3 observes them from the lab. Unlike alterations to history, the anomalies they confront in-game create alterations that would be unlikely or even impossible in the official history of the real world. The purpose of the Dragon Ball Heroes team is to investigate the anomalies and find "the menace" responsible in order to prevent the game world from collapsing which can allow game world enemies to appear in the real world.
Over the course of World Mission, other players are recruited into the team's ranks. Eventually "the menace" is revealed to be former Galactic Patrolman and the first Time Patroller Sealas who left the organization after a disagreement with Chronoa after he witnessed the destruction caused by Kid Buy. Driven by a misguided sense of justice, Sealas sought to acquire enough power to carry out his plan to destroy the Scroll of Eternity and rewrite history. After Beat and Note use the Hero Switches to be able to fight in the real world, Beat gains his own Great Saiyaman Suit and dubs himself Great Saiyaman 4. Chronoa calls in Xeno Goku and Xeno Vegeta to assist Great Saiyaman 3 and his team against Sealas and his creation Ahms. During this time, Beat and Note learn of Great Saiyaman 3's true identity as Xeno Trunks after criticism from Xeno Goku and Xeno Vegeta. The Dragon Ball Heroes team itself is a specialized group of SDNH players affiliated with the Time Patrol, thus is subordinate to Chronoa's authority.