Now, go back to 1000AD to see the stone. well, the stone is stolen.

hmm, i wonder what's sparkling at the Mayor's Manor.

liar!! HE stole the stone!! but well, nothing u can do about it.

okay, go back to 600AD

you find that man's ancestor wants some Jerky.

back to present time, and buy a Jerky at Snail Stop.

Now, choose to give that woman the Jerky free of charge. she will be impressed and she promises to teach her children not to be greedy.

Now, that man is totally changed!! he's more than happy to give you the moonstone!!

Then, place the moon stone back in place.

Go to 2300AD Sun Keep, and you will find that the stone is now a Sun Stone.

Well, Lucca made a good use of the Sun Stone and made her best weapon the WonderShot!!

Now, bring the sun stone back to Melchior, and he will make the Rainbow sword!! Crono's best weapon!!

hmm, anywhere we left unvisited? yup here's one, the Geno Dome. Take this chance to raise your levels, it's a very good place.

If you wanna build up your levels, choose "yes" to leave and enter again.

hmm, what's that robot doing there??

okay, you gotta charge Robo's body with electricity to open doors.

first one you can open is this one. notice the switchs' order, red green red on the right.

now if you found the way to the second floor, enter that door. it will lead you back to the first floor which does let you do something.