Complex sentence: Created by Ken Sugimori, Clefairy first appeared in the video games "Pokémon Red" and "Blue" and subsequent sequels, later appearing in various merchandise, spinoff titles and animated and printed adaptations of the franchise.
Split into simpler sentences: Created by Ken Sugimori, Clefairy first appeared in the video games "Pokémon Red" and "Blue" and subsequent sequels. They have later appeared in various merchandise, spinoff titles and animated and printed adaptations of the franchise.