Chrono Trigger Secret Party

[Berry]

Yeah found this online on youtube by accident but i did some studies and here is the following things:
After finishing a game, it will allow you to carry some eqipment and something about stats to a new one but you can use this to beat the final boss before you actually do it. However this is the diffucult part since you only have at least two characters instead of the whole team.
And IF you beat him you come to the end of time in go to the room when you Meet the developer.