Gigabyte is a class 5 energy absorbing Super Virus created from the virus Killabyte. Killabyte was captured in the Super Computer and was scheduled for deletion, but just before the procedure, he received a viral upgrade from the User that programmed him. The upgrade skipped a generation, and Killabyte quickly grew several sizes larger and gained the following abilities: flight, portal-forming, trans-finite power reserves, and the power to drain energy from anything it touched with its new elongated claws. At this point, the new virus began calling himself Gigabyte, Destroyer of Systems.
Just after Gigabyte's viral upgrade, he was caught in a Gateway Command originating from Mainframe's Twin City, which pulled him there. When he arrived, he unwittingly overloaded the gateway, causing an explosion which destroyed the entire city. The explosion nullified everyone in the Twin City and split Gigabyte in two, creating two new viruses: Megabyte and Hexadecimal.
Theme song: Gigabyte Attack
The ReBoot Multiuniverse[]
Gigabyte was reformed as a Web Creature infected and assimilated Megabyte, and soon Hexadecimal. Bob found out it can absorb energy as well as duplicate abilities from its victims. A perfect example was absorbing Hack's energy enabling him to fly after Mainframe was separated into sectors. Akari and Mewtwo advised the Pokémon, mainly Bellossom, Vileplume and Sunflora to never use any energy moves, as well as their special attacks being disabled. It wasn't until Mouse and Dot dropped a Tear onto the enemy, and Glitch using a splitter separating Hex, Megabyte, and a third portal throughout the System.