Genesect is a bipedal, insectoid Pokémon with a metal body and a saucer-shaped head. It is primarily purple with several gray markings. It has two large red eyes and a small white part that could be either its mouth or a vent. It has thin arms with overlapping segments. Each arm ends with a single, pointed claw. There is a gray circle on each shoulder, and a gray band around its abdomen. Its segmented legs each end with a large, upward curving claw.
The powerful cannon on its back and other enhancements were apparently added as part of the bizarre modifications made to it by Team Plasma. It is the only Pokémon capable of learning the move Techno Blast, an attack which changes type depending on the Drive it holds. It is indicated that even before Team Plasma powered up Genesect, it was a skilled and ruthless hunter. By folding up its limbs and connecting its head to the cannon on its back, Genesect can assume a flying saucer-like form, allowing it to fly. This form is known as the High-Speed Flight Form (Japanese: 高速飛行形態).
History
Genesect was revived from a Fossil and technologically enhanced by Team Plasma to create the most powerful Pokémon ever. N had the project cancelled and the P2 Laboratory closed because he felt that Pokémon, who he thought to be perfect beings, would lose their beauty if modified by science. However, Scientist Dudley kept working on it, angry that N denied his talent. This scientist reconstructed Genesect and installed the cannon on its back.
N discovered an image of a Genesect on a computer monitor at the ruined P2 Laboratory in The Name's N! while he was investigating Team Plasma's plans.
The Genesect Army, a group of five Genesect led by a Red Genesect, first appeared in Meowth, Colress and Team Rivalry!. During his investigations, N found a destroyed building where a Patrat and Watchog were. By using his power to hear their voices, he had a flashback where he realized that the Genesect Army was responsible for the destruction.
The Genesect Army has a major role in the sixteenth movie. In the film, they appear in New Tork City and go on a rampage, bringing them into conflict with a Mewtwo.
In the Pocket Monsters B2 W2 ~ A New Legend ~ manga
Genesect was a Pokémon created by Dr. Zeno. After it saved Dr. Zeno from being trapped in his lab, he decided to give it to Arata in order to bring out its full potential.
Genesect is the only Pokémon which ends a generation in National Pokédex order that is not Psychic-type in at least one form.
Of the Generation V event legendary Pokémon, Genesect is the only one that does not have an event signature move. Victini, Keldeo and Meloetta obtain their respective signature moves through events, whereas Genesect has Techno Blast as a starting move.
Genesect's backstory is similar to Mewtwo's: both were created by villainous teams in at least one canon, and genetically engineered and enhanced to be more powerful.
Genesect's different sprites are not recognized as form differences by the Pokédex. The same is true for Arceus.
Origin
Genesect is generally based on the giant insects of the Paleozoic era, which existed for 300 million years, making it as old as the cockroach. Its Steel-type features that give it a somewhat robotic appearance may be a reference to alien robots in science fiction media; however, this may be because of Team Plasma's modifications. Its design is also possibly inspired from the "Artillery Mech" concept used in various Sci-Fi anime produced in Japan.