XCI is a file format used for Nintendo Switch game cartridges and downloadable content. In the context of ONE PIECE ODYSSEY Deluxe Edition, the XCI DLC refers to additional content that can be downloaded and added to the base game.

Initially offered as a pre-order or early purchase bonus, including accessories like "Drop Rate Up Petite Jewelry". Bandai Namco Entertainment Technical Specifications

: Runs at a stable 30 frames per second with dynamic resolution scaling to maintain performance in handheld and TV modes.

For the average pirate (pun intended), the standard edition might suffice. However, for One Piece completionists, the is the gold standard.

If you're looking to install and play ONE PIECE ODYSSEY Deluxe Edition with DLC on your Nintendo Switch using an XCI file, here are some general steps: