The place and circumstances of the Super Young Team's formtion are unknown; presumably they did so motivated at least in part by a desire for fame and adventure.
Seeing their powers as mainly cosmetic, the team never got involved in fights. They spent a lot of their time lounging in the metahuman clubs of Tokyo; to the elder Japanese superheroes, the team were prime examples of the younger generation's trivialization of their calling. While they'd done a few minor good deeds, Most Excellent Superbat was waiting for something that would make their name and establish their reputation.
When renowned sumo wrestler Sonny Sumo showed up in a club, the Super Young Team sought his autograph, but were rebuffed. Shilo Norman, the escape artist Mister Miracle, also sought out Sonny at the club, hoping to get Sonny's help in fighting Darkseid's forces in the upcoming Final Crisis. The team overheard Shilo's request.
A few days later, when Sonny and Shilo were attacked by a squad of Darkseid's Justifiers at the airport, the Super Young Team helped the duo escape in their Wonder Wagon. Shilo's Motherboxx opened a Boom Tube, transporting the Wonder Wagon and its passengers across time and space. During their journey, Shilo took the opportunity to teach the team a sigil that would shield them from Anti-Life.
They arrived in Checkmate headquarters in Switzerland one month later, as the Final Crisis reached its endgame, New Earth's reality fracturing under the weight of Darkseid's presence.
After the events of Final Crisis, they were caught in a plot to distract the world and Japan's citizens from the damage Japan had suffered during the crisis, which culminated in the team breaking up, then reforming to face the aging hero Rising Sun who had been controlled by the villainous Mister Mind who had taken residence inside his brain and heightened his powers. Super Young Team successfully defeated Mister Mind and saved Rising Sun, followed by which Most Excellent Superbat secretly bought Japan, rendering the plot pointless.
Equipment: None known.
Transportation: The Super Young Team has a car called the Wonder Wagon, which is capable of powered flight.
Weapons: None known.
- According to Grant Morrison, the team are thematically linked to the Forever People of the Fourth World, representing that role in the upcoming "Fifth World". 
- From Grant Morrison's notes in Final Crisis: Secret Files, the Wonder Wagon was designed and paid for by Most Excellent Superbat, and is the team's official transport. It can do 500 mph on the ground, and can reach the speed of sound when in flight.
- No trivia.