In Sonic Heroes, Rouge was looking for Eggman's treasure but found Shadow in a statis pod. She released Shadow and accidentally released Omega, which lead to the two fighting. Rouge stopped the fight and convinced the two to work together with her, forming Team Dark. They went through various locations, encountering a fake Dr. Eggman (in reality Metal Sonic) as well as Team Chaotix and Team Sonic on the way. In the end, the team teamed up with the two teams and Team Rose in order to defeat Metal Sonic.
Since then, the team co-operated on various missions and became close. Between the events of Shadow the Hedgehog and Sonic the Hedgehog (2006), Shadow became a member of G.U.N., a group Rouge was already part of, but Omega was never stated to be part of G.U.N. in the games. During the events of Sonic 06, the group teamed up to defeat Mephiles.
In Sonic Chronicles: The Dark Brotherhood, all three members of Team Dark could join Sonic's party. Rouge joined first, and Shadow joined after Sonic's party defeated him in a battle. In Metropolis, a team including Tails and Eggman could find Omega. If all three members were in the party at once, they could use a special POW move called Metal Storm.
The three appears as a group in Sonic Forces, more notably the prequel story Episode Shadow. In this game, the three fought against Infinite. They are also set to make an appearance in the upcoming Team Sonic Racing and appear in the spin-off mobile game Sonic Runners Adventure.
Team Dark also appeared as a team in the Archie Comics, both Pre- and Post-Super Genesis Wave. In both of these, they were part of G.U.N. and in the Pre-Super Genesis Wave, the team also included Hope Kintobor, Eggman's niece. They were also present in the IDW comics, where they were allies of Sonic.
Team Dark is a popular group in fanon, with plenty of fanart existing as a group. Drawing Team Dark as a group is generally not thought of as "shipping" since they are a canon group and "shipping" is usually used for romantic pairings. As such, it is not involved in shipping wars as Team Dark's existence does not contradict any romantic ships involving Shadow, Rouge or Omega. On DeviantArt, a fanclub for the group has over 500 members.
- Omegouge — the ship between Omega and Rouge
- Shadomega — the ship between Shadow and Omega
- Shadouge — the ship between Shadow and Rouge