In One Piece Odyssey Chopper’s experience and skills will be taken from him. In order to get them back, you’ll need to locate 30 cube fragments scattered around Waford Island. Below is a guide on where to find his cube fragments in Waford. You’ll receive the Cube Collector: Chopper trophy/achievement for finding all of his cube fragments.
Dust Ruins
Dust Ruins Corridor Room
This fragment is located in the northern part of the room being guarded by a giant beetle.
Lake Shore Cave
Lake Shore Cave
Chopper’s cube fragment can be found under a ledge near the entrance to the cave. You’ll need to use Gum-Gun Rocket on the grapple point northwest of the save point. From there, Gum-Gum Rocket to the southern grapple point then look up to the eastern ledge to find the fragment. You’ll need to use your Gum-Gum Rocket to nab it.
Waford South
Thunderhead Bluff
This fragment can be found to the left of a stone archway along the path leading to the Thunderhead Ruins.
Waford Central
This cube can be found in a nook to the left of the entrance to the Sky Tower.
Ice Block Ruins
Last Experiment Room
This cube can be found in the southeastern part of the room on a platform. If you follow the southeastern path to the dead end, you should see it to the southwest and will be able to grab it using Luffy.
Sky Tower
Purity Garden
This cube can be found in a bird nest in the center of the area.
Purifying Bluff
This cube can be found in the central-eastern part of the area on a rock ledge near a small tunnel that Chopper can fit through.
Forest of Cleansing
This cube can be found on a rock ledge in the northeastern part of the area near the climbable wall.