Beat the game, it doesn't matter what ending you get, you will be able to load data from another game and beat the game within 20 hours, You can speed up the NewGame+/Continue+ games by pressing R2, L2 Slows down the game. You also get the Relief Charm, so you don't have to have Serge in your party. You also have the Time Egg when you wake up. All your Key Items are gone, Your Recruited Characters, The Chrono Cross is gone (Item and Element), the MasterMune, and your Summons.