Sora: Yeah. The Keyblade locked it automatically.

Aerith: Good.

Leon: Every world among the stars has a Keyhole. And each one leads to
the heart of that world. There must be one in this town as well.

Sora: What do you mean?

Aerith: It was in Ansem's report.

Leon: The Heartless enter through the Keyhole and do something to the
world's core.

Sora: What happens to the world?

Aerith: In the end, it disappears.

Sora, Donald, & Goofy: What!

Leon: That's why your key is so important.

Aerith: Please lock the Keyholes. You're the only one who can.

Sora: I don't know...

Leon: Seeing other worlds would probably serve you well.

Donald: Yeah!

Goofy: We gotta find your friends! And King Mickey!

Sora: I guess you're right... Okay!

Sora talks to Leon again.

Sora: Hey, Leon. This gummi block's different from the others. Do you
know what it's for?

Leon: (wondering) .........

Aerith: Ask Cid. He should know.

Leon: Wait, Sora. Take this with you.

Sora's group received Earthshine.

Leon: This stone holds some mysterious power. I've been carrying it for
luck. I want you to hold onto it.

Sora: How do you use it?

Leon: (wondering) .........

Sora's group visits the Accessory Shop and talks to Cid.

Cid: What've you got there? Hey! Well, if it ain't a gummi block.

Donald: Yup.

Goofy: What's this one for?

Cid: You're kiddin' me! You're flyin' a gummi ship and you don't know
nothin' about navigation gummis? Bunch of pinheads. Interspace ain't no
playground.

Sora: There's a lot we don't know. So what! We have to use the gummi
ship to go to other worlds. We don't have a choice.

Cid: Whoa, easy. I didn't know. No hard feelings, all right? Well, I
guess could lend y'all a hand, then.

Sora: Thanks.

Cid: Basically, with navigation gummis, you can go to new places. You
want one on your ship, right?

Donald Duck and Goofy nodded.

Cid: I'll install it for you. But I got this thing I gotta go deliver
first.

Sora: What do you need to deliver?

Cid: Just this book. It's real old. When the guy brought it in, it was
practically falling apart. Too beat up to restore it to the way it was.
But overall, I did a decent job puttin' it back together. Anyway, you
mind deliverin' it for me? It's the old house past the Third District.
Look for a big fire sign.

Sora received the Old Book. Then, Sora's group felt a shaking and then
heard a bell sound.

Sora: Wh-What was that?

Cid: Hmm? The bell at the gizmo shop is ringing. Go check it out if you
want, but deliver that book for me first. When you're done, stop by the
house in the Third District. I'll be there.