First we got a chance to listen to the songs from Final Fantasy I to Final Fantasy VII in Theatrhythm Final Fantasy Curtain Call. This 26 minute video starts with "The Man with the Machine Gun" from Final Fantasy VIII and ends with "Torn from the Heavens" from Final Fantasy XIV.
Spinoff games like Final Fantasy X-2 and Final Fantasy Type-0 aren’t included. Neither are the Romancing SaGa songs, which means Square Enix probably has one more video. If you have a Japan region 3DS you can download a second Theatrhythm Final Fantasy Curtain Call demo. This includes "Edgar and Sabin’s Theme" from Final Fantasy VI and "Let the Battles Begin (Piano version)" from Final Fantasy VII: Advent Children.
Edgar from Final Fantasy VI, Barret from Final Fantasy VII, Eiko from Final Fantasy IX, and Tifa with her Final Fatnasy VII: Advent Children look are playable. Reno shows up as an enemy in the Advent Children song. Saved data from the demo can be transferred into the retail game which will unlock 10 additional characters from the beginning.
Zack (FFVII), Ace (Type-0), Cosmos, Yuna 2nd Version (FFX-2), Ramza (FFT), Ciaran (FFXIV), Benjamin (FFMQ), Tifa 2nd Version (FFVII Advent Children), Serah (FFXIII), and Lightning 2nd Version (Lightning Returns) will be unlocked in addition to fourteen Final Fantasy characters representing each numbered title.
Theatrhythm Final Fantasy Curtain Call comes out on April 24 for Nintendo 3DS in Japan.