Mainframe is the city inside a computer. The city is divided into six sectors. Baudway, Kits, Floating Point Park, Beverly Hills, Wall Street, and Giedi Prime, also known as G-Prime. Each of these sectors also contains several subsectors averaging the size of a Game Cube. In the center of the city is the Principal Office, the city's operating and command center.
Mainframe used to have a Twin City connected to it by the Gilded Gate Bridge. The Twin City was nearly the same size as Mainframe itself. This city was destroyed by an explosion caused by the virus Gigabyte when he damaged Welman Matrix's Gateway command generator. All that is left of the twin city is a small island called Lost Angles, connected to Mainframe by a twisted bridge and ruled by the chaotic virus Hexadecimal.
Bob moved to Mainframe from the Super Computer. He came to the small system soon after the destruction of the Twin City. Bob decided to remain in Mainframe and protect the city from its enemies.
The city's operator and the system administrator is Phong. After the Web War, Dot Matrix came in to work with Phong and became the military's command.com, he often let her take command of military situations.
Mainframe is protected by the CPU defense force. They maintain a large stockpile of weapons in the Mainframe Armory in the Principal Office.
The city is firmware and cannot be changed to different formats, such as Game mode. The Principal Office is hardware, supporting the city.
Giedi Prime sector is completely controlled by Megabyte and his virals who helped establish the evil virus' dominion there. He ruled it from the tower of Silicon Tor.
Mainframe had several conflicts over the years with the viruses that shared the city with its citizens, as well as outside threats.
The ReBoot Multiuniverse[]
This was the main location of the Multiuniverse. Even Akari and her Pokémon's new home. After she got sucked into a defective computer in New Island, she met Dot and Bob a little later as they faced off Megabyte inside her first Game. A few days later, she decided to leave since there was a Tear in the sky as she never wanted to babysit a System with incompetent leaders as Bob and Dot kept on arguing with each other instead of saving their world! She eventually returned, but to her surprise, the civilians built their own Pokémon Stadium at the northeast corner! Complete with a massive stadium, sundries from Kanto and Johto, and a large apartment for her and her comrades!
Of course, it suffered from so much damage during the fake upgrade done by Megabyte and was so close to being erased or powered down after Gigabyte attacked and sustained so much damage during the Web/Viral Wars. It soon turned into Megaframe and the Stadium was abandoned. It went thru a System crash, and the User restored everything via backup. Then it took a few hits during Daemon's regime, then the civilians were zombified as Trojan Megabyte took over. It restored itself again after Mega Rayquaza obliterated the lot of them.