Ending ~ Le Trésor Interdit
From Chrono Wiki, a database for the Chrono series that anyone can edit
"Ending ~ Le Trésor Interdit", also called "Radical Dreamers - Le Trésor Interdit-", is a musical track from Radical Dreamers: Nusumenai Hōseki, scored and composed by Yasunori Mitsuda. The song plays during the ending credits of the game. In French, "Le Trésor Interdit" means "The Prohibited Treasury", which may allude to Fort Dragonia from Chrono Cross.