Japanese video game designer Ken Sugimori designed Mewtwo for the first generation of "Pocket Monsters" games, "Red" and "Green", known outside Japan as "Pokémon Red" and "Blue". In the games, Mewtwo is the result of genetic recombination on a sample of DNA acquired from the mythical Pokémon Mew. In the anime adaptation, however, it is instead a modified clone whose name means the "second Mew". Until the first "Pokémon" movie was released in the United States, Mewtwo was rarely referred to as a "clone" in Japanese sources. Kubo Masakazu, executive producer of "Mewtwo Strikes Back", explained that they "intentionally avoid using the term 'kuron' … because the word has a frightening feel".