The One Piece Card Game banlist is one of the only external deckbuilding rules Bandai Namco places on local and competitive play, with the most powerful or synergistically strong cards hitting the chopping block.
Bandai originally decided to keep the ever-evolving banlist quite sparse in the early days of the One Piece card game, only really blocking set two’s Cabaji. Whitebeard’s iconic ship, the Moby Dick, was added quickly after the Paramount War set was released though, when it became clear how meta-warping the red stage could be when paired with other Whitebeard Pirates cards.