As you're nearing the entrance to Castle Town, the Treasure Chest will be right in front of you.

From the Save Point near the fountain in the center of town, hug the righthand side and turn right between the first set of houses you come to. Then turn left, and the Treasure Chest will be on the backside of the house, near some barrels.

From the Save Point near the fountain in the center of town, head straight back and climb the stairs along the back wall. Round the corner to the right and you'll come to a split in the path: the left split ascends some platforms while the right path descends to a circular courtyard. Take the left path leading up, and the Treasure Chest will be right in front of you after climbing a few platforms.

Available only after saving a file with Clear Data. From the Save Point near the fountain in the center of town, head straight back and climb the staircase along the back wall. Turn immediately to your left, and the Treasure Chest will be near the lamp post.

Available only after saving a file with Clear Data. Return to where the Virgo Relic was found, and take the left path at the split, leading upward. Continue climbing the platforms that take you above the town, and follow the path of platforms to your left. You'll need to use the Doubleflight and Air Slide abilities to span the gap to a large floating house. Jump across the remaining nearby platforms, and the Treasure Chest will be at the end of this path, at the highest point in the town.

Upon entering The World Within, the Treasure Chest will be on your right.

Move counter-clockwise from the Save Point and look at the first mirror. The room is filled with Treasure Chests, but only one of them is closed while the rest are all open. Enter the mirror and open the Treasure Chest that was closed before you entered. It will be the one closest to the exit mirror, on your left.

Continuing from Treasure Chest 4/13, locate and attack the 2nd and 3rd glowing pillars in the room. Upon examining the 3rd and reversing the room's gravity again, the Treasure Chest will be next to the pillar directly in front of the exit mirror.

From the main room, enter the mirror that leads to the Mine. Continue along the main path until you reach the area with the rotating platform in the mirror, just before the exit. If you're facing the exit, there is a platform high up off to the left. Examine the central mirror when the rotating ramp is facing out toward that platform to materialize a path up to it. Ascend the path and jump to the platform to find this Treasure Chest.

Available only after saving a file with Clear Data. In the main room, this Treasure Chest is behind the altar of the mirror that leads to the Endless Staircase.

Available only after saving a file with Clear Data. Return to the Labyrinth and examine the first two glowing pillars. Make your way to the altar that houses the exit mirror, and look two pillars to the right of the pillar where you found Treasure Chest 5/13. This Treasure Chest will be next to that pillar.

Available only after saving a file with Clear Data. Continue from where the Leo Relic was found and make your way up to the large open area where the Heartless typically spawn. The Treasure Chest will be along the outer edge of the platform.

Continue up the main path until you reach a large, open room with climbable pillars. Ascend the pillars and ride the spiraling rail to a platform high above the room. Locate a second platform nearby and jump the gap to find this Treasure Chest.

From the second Save Point, continue up the main path. As you come to a section with Darkside Heartless on either side of the path, locate a series of steps along the left-hand side. Climb these steps and tilt the camera up to locate a patch of red thorns above you. Cast a Firaga spell to break them, then jump up and Air Slide across the gap to reach this Treasure Chest.

Return to the bottom of the staircase and this time take the staircase on the right. As you climb, the staircase will break off, leading to a ledge on your right that you can jump to. Once on that ledge, jump across even further to another ledge, where you'll find this Treasure Chest.

Return to the base of the two staircases and climb the one on your right. This time, climb it all the way to the top and then back down again. You'll come to another split in the road; one blocked by red thorns that leads up, and the other blocked by black thorns leading down. Choose the path leading down, and this Treasure Chest will be found at the end of it.

On the final staircase leading to the boss fight with Darkside, hug the right-side wall until you locate a path leading down. The Treasure Chest is at the end of it.

Available only after saving a file with Clear Data. Just beyond the first open room (with the pillars that lead to the spiral rail where you found Treasure Chest 2/12), follow the main path until the road splits. Take the left-side path leading down, and this Treasure Chest will be at the end of that path.

Continue up the path from where you found Treasure Chest 1/6, until you reach a section where the ground forms a ramp in the middle. On the other side of the ramp is a cave that leads down inside the ramp; enter the cave and follow the path downwards. The Treasure Chest is in a small clearing off to your left.

Continue down the slope from where you found Treasre Chest 3/6 and this Treasure Chest will be at the bottom to your left.

Available only after saving a file with Clear Data. Return to where you found Treasure Chest 5/6 and look for a pillar to the right of the giant opening in the back of the room. This Treasure Chest is on top of that pillar.