There's another ending variation in Chrono Trigger that I haven't seen anyone explain why it happens.
During the Crono Alive - Epoch Safe ending. At the teleports scene, after all the characters leave but before Crono's mom and cat appear, two different conversations can happen:
1) "Lucca: Do you remember that talk we had?
Marle: You mean about whether our lives flash before we die?
Lucca: I get the feeling that 'entity' is finally at rest
Marle: Yes, I feel that too."
2 "Lucca: I though lavos made the gates... But I guess I was wrong.
Marle: What do you mean?
Lucca: I think a greater force wanted us to experience these events."
The same variation happens in the ending with Crono Alive - Epoch Destroyed, and Crono Dead - Epoch Safe. It does not happen in the Crono Dead - Epoch Destroyed ending.
So far I haven't found what triggers it. Does anyone here know what causes it?