Original sentence: In 1998, Ono Toshihiro was asked to write a side story for Pokémon: The Electric Tale of Pikachu to coincide with the release of Mewtwo Strikes Back detailing Mewtwo's origin, which would not initially be covered by the film
Edited sentence: In 1998, Ono Toshihiro was asked to write a story detailing Mewtwo's origin to coincide with the release of Mewtwo Strikes Back, which did not initially cover that aspect.Regardless, the story saw print as a side story for Pokémon: The Electric Tale of Pikachu in the July 1998 issue of CoroCoro Comic