Final Fantasy is one of the most prolific video game franchises. Having debuted in 1987 with Final Fantasy on the NES, the franchise has had an unfathomable amount of entries in the three-and-a-half decades that have followed. From 15 mainline entries, some featuring their own dedicated sequels, to a range of spin-offs spanning multiple video game genres, and a slew of animated series and movies, Final Fantasy is everywhere, and that includes crossovers with other video game properties. The newly announced Final Fantasy Theatrhythm: Final Bar Line is set to cross over with several popular Japanese gaming franchises.