In One Piece Odyssey Robin’s experience and skills will be taken from her. 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 her cube fragments in Marineford. You’ll receive the Cube Collector: Robin trophy/achievement for finding all of her cube fragments.
Marineford City Area
North Town
This cube can be found on the west side of South Town near the cannon. Look to the right of the cannon to find an alleyway blocked by debris. Have Chopper walk through the small opening to find the cube.