"T.O.P" is one of the ending theme songs for the Japanese version of Sonic X. It was used for episodes 40-52(last 13 episodes in Series 1 or Season 2). During the show's original run, it was used from 4 January 2004 to 28 March 2004. It was produced by the Korean-Japanese duo KP. The accompanying clip also shows drawings of Sonic the Hedgehog transitioning from drawing to anime. An instrumental version of the song is played in the ending credits of the French dub of Sonic X.