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 Alabasta. You’ll receive the Cube Collector: Chopper trophy/achievement for finding all of his cube fragments.
*THIS GUIDE IS A WORK IN PROGRESS! IT WILL BE UPDATED AS WE PROGRESS THROUGH THE GAME!*
Alubarna Royal Mausoleum
Royal Mausoleum B4F
When you reach the save point at the southern part of the room, head down the western steps following the path to find a grapple point. Grapple a couple of times to reach a broken section of the walkway where the fragment can be found.
Desert Near Alubarna
Alubarna Ravine
From the southern save point, follow that path north taking a left at the fork. You’ll then need to use Chopper to head through a small opening under the boarded doorway. Take a right to find the cube near the cliff edge.