The manner in which you face it and the point in the storyline in which you do changes the ending you see. No matter what, all game endings revolve around fighting Lavos.
CHRONO TRIGGER ENDINGS OPTIONS WINDOWS
2.14 Ending 13: Dream's Epilogue (DS, iOS/Android, and Windows exclusive).2.5 Ending 4: The Successor of Guardia (aka: "The Wedding").2.2.4 Ending 1d: On that Day, 10 Years Ago.