In One Piece Odyssey Brook’s experience and skills will be taken from him. In order to get them back, you’ll need to locate 6 cube fragments scattered around Wayford Island. Below is a guide on where each of his fragments can be found. You’ll receive the Cube Collector: Brook trophy/achievement for finding all of his cube fragments.
Waford South
Waford Central
This cube can be found south of the tent near the Sky Tower through the small opening that Chopper fits through.
Sky Tower
Purity Garden
This cube can be found in a bush under the group of vines north of the save point.
Purity Garden
This cube can be found in a bush on top of a platform northwest of the save point.
Purity Garden
This cube can be found on a rock ledge northwest of the save point.