Yup, this is Toma, the guy who goes on a journey for the rainbow shell.

As he told us, go to West Cape to pour that thing he gave you on his headstone. and his spirit will tell you where the rainbow shell is.

Yup, here, the Giant's Claw is where he found the rainbow shell.

hmm, doesn't this dinosaur look familiar? you are right! Giant's Claw buries the ruins of the Tyrano's Lair 65,000,600 years ago!!

Defeat that boss, then you would see the rainbow shell. and you would be taken back to the Guardia Castle so you can ask for help to move the rainbow shell.

Well, the rainbow shell is then stored in the castle for 400 years. Take Marle with you and enter the castle 400 years later.

take this path again.

now, you find something different. go up there first, and you will learn that the King is on trial.

To prove the King's innocence, you gotta go to the basement to find the rainbowshell.

Surprise! it's there!!

head back up to the court. Those guys wouldn't let you in, worry not, This is Marle's castle!!

okay, you would then enter the court from the back, and fight the Yakra XIII(is that it?) which is an upgraded version of the very first boss you saw in the game. he's kinda tough. but he would leave a key there, come back to take it after you defeat him.

Use the key to save this dummie, whose generations have been kidnapped all the time.

okay, Melchior appears, and he will make goods for you in the basement. However you learn that if you can bring him the sun stone, he can make more powerful weapons.

So, now go to the Sun Palace in 2300.

fight the Son of Sun, a guessing game here, which makes this guy tough.

then you will get the moon stone. err??? shouldn't it be the sun stone?

 you need to charge the moon stone first, so go back to 65000000BC and leave the stone in Sun Keep.