Genesect

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 that are capable of glowing, 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 from which it can spin a sticky string to create structures. 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.

Genesect was revived from a Fossil and technologically enhanced by Team Plasma to create the most powerful Pokémon ever. N had the project canceled 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. According to a Hiker in Ambrette Town's Fossil Lab, there is a rumor that Genesect can be found in Glittering Cave.

By folding up its limbs and connecting its head to the cannon on its back, Genesect can assume a flying saucer-like configuration, allowing it to fly. This configuration is known in Japanese as the (高速飛行形態 high-speed flight configuration).

Forms
Genesect has four alternate forms determined by the Drive it holds: Shock Drive, Burn Drive, Chill Drive, and Douse Drive.

The powerful cannon on its back and other enhancements were added as part of the modifications made to it by Team Plasma. Genesect is the only known Pokémon capable of learning the move Techno Blast, an attack which changes type depending on the Drive it holds. Even before Team Plasma modified Genesect, it was feared as the strongest of hunters.

(Source: Bulbapedia)