The theme comes from Mighty Morphin Power Rangers, the American superhero series that premiered in 1993 and adapted Japanese Super Sentai footage. Written and performed by Ron Wasserman as Go Go Power Rangers, the song became inseparable from the show's morphing sequences and team roll calls. Its short chant and metal-influenced riff made it easy to quote, parody and remix, so it survived through later series, movies, games and online videos as instant shorthand for a heroic group transformation.