Well, I am currently trying to get all of the endings myself. So far I've gotten teh standard ending, the end of the world you lose ending and the nu chasing the whatever its called ending. Lame I know, but I've been playing Chrono Cross too.

If you want a list of all the endinds and how to obtain them. Just go to the main page of eyesonff dude. Then go to the ct page and you'll find a list of all the endings and how too get them.