Complex sentence: Foxy is a video game character in the King of Fighters series, she in fact first appeared as a striker for Kula Diamond in The King of Fighters 2000 she was first playable in The King of Fighters 2001 as one of the top tier characters.
Split into simpler sentences: Foxy is a video game character in the King of Fighters series. She first appeared as a striker for Kula Diamond in The King of Fighters 2000, and was first playable in The King of Fighters 2001 as one of the top tier characters.