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A Drive (Japanese: カセットCassette) is a type of held item introduced in Generation V, used for changing the type of Genesect's signature move, Techno Blast, to the corresponding type of Drive.
In Black, White, Black 2, and White 2, they are obtained by showing Genesect to a Scientist named Dudley at the P2 Laboratory. The Burn Drive and Shock Drive are obtained in Pokémon Black or Black 2, while the Douse Drive and Chill Drive are obtained in Pokémon White or White 2.
In X and Y, the Drives can be obtained by showing Genesect to a Hiker at the Fossil Lab in Ambrette Town. He says that he received the plans for the Drives from an acquaintance of his in Unova and made the Drives from them himself.
In Omega Ruby and Alpha Sapphire, the Drives can be obtained by showing Genesect to a Street Thug on the second floor of Mauville City. He claims that they are rare items that came from the Unova region through some shady market.
A cassette to be held by Genesect. It changes Genesect's Techno Blast move so it becomes Electric type.
In the anime
The four Drives appeared in Genesect and the Legend Awakened. Each of them was attached to a member of the Genesect Army, with the exception of the leader, the Red Genesect. While it was used with the same purpose of changing the type of Techno Blast in the movie, it was also the key item to tell each Genesect apart, with the one holding the Douse Drive having a different personality from its group.
It wasn't shown or mentioned in any point of the movie that Genesect could switch or take off the Drives.
Burn Drive
Chill Drive
Douse Drive
Shock Drive
In the manga
The Drives in Pokémon Adventures
In the Pokémon Adventures manga
From Mr. Perfect to Innocent Scientist, Colress used Genesect to battle against Blake. After falling for one of Blake's taunts, Colress angrily switched the Drive on Genesect's back for a Shock Drive in order to put Blake's Dewott at a disadvantage against the Paleozoic Pokémon. Once Blake had defeated and captured Genesect, he obtained the Shock Drive in the process.
The Shock Drive was later given to the Magician in order to reverse-engineer another set of Burn, Chill, and Douse Drives. Blake used the Burn Drive to battle Team Plasma on the Plasma Frigate, though, due to it being incomplete at the time, Genesect was injured by its own attack and left exhausted after using Techno Blast on some Team Plasma Grunts. After Blake had later used the Fire-type Techno Blast to save the Swords of Justice from being frozen in ice, Cobalion knocked the damaged Burn Drive off of Genesect's body, after which it exploded.
In Pokémon Adventures, the unnamed Drive attached to Genesect's back in called the Neutral Drive (Japanese: ノーマルカセットNormal Cassette).