Those who played Chrono Trigger should recognize this place as Lucca's house which has been turned into an orphanage. And worse still, it's on fire. You can take the opportunity to rescue some kids here, and earn a Rainbow Shell at the end if you find them all. Begin by speaking to Gato then check the grandfather clock on the right to find kid #1. Next to the clock on the left is a machine. Activate it with X then press buttons in this order: L1, Triangle, R1, Triangle, then hit X again (you must hear a chime for each one). If done correctly, you'll get Kid's level 7 tech, HotShot.Moving on to another room, defeat the LavaBoy and speak to the boy here (kid #2) to receive a Nostrum.
Chrono cross endings #3 True Hero(with,without Kid) - Duration: 10:24. Crezber 31,316 views. Personally, I saved kid the first time through. You still get her back if you don't save her, but it's at a later point in time. If you save Kid, you get Mel, Razzly, and Korcha. If you don't save Kid, you get Glenn, Doc, and Macha. Glenn is a great character, Macha is pretty decent. Doc gets the best healing tech in the game.
The next room to the north has a Stardust Cape in the corner. After this, fight your way through and back out to the corridor, climbing some stairs to the west leading to a room with an Ice Gun at the corner; Over at the southwest room is a Diva Dress.Return to the corridor and take the eastern stairs this time.
Defeat the LavaBoy here then look under the bed to save kid #3. You will also receive a Rainbow Shell from her. Exit southwest to the balcony, defeating another LavaBoy to reach a boy who gives you a Nostrum. Back to the previous room, down the hatch to corridor. Follow this while looking at the drawings on the wall. Use the Ice Gun; enter the door.You'll be taken back to Radius' place after the event sequence, with Kid joining your party again.
Don't forget to equip HotShot on her and upgrade some of her gear if you like, before heading to Viper Manor. Visit Luccia in her lab for Lucca's letter which also includes a Rainbow Shell.