Some may find it hard as the game tries to balance out both characters in
duel mode, which means that your buffed up hero will not be that
powerful against the supposedly lowly
enemy officer.
Battle Colosseum in One Piece: Unlimited World Red is comprised of a few sub-modes — Battle Royale (which is a free - for - all in where two to four characters can duke it out),
Duel competition (where players battle one - on - one, kind of like a VS mode), Boss Rush (a survival mode that pits players against bosses one after the other), and Chaos Battle (allows players to take on multiple, less
powerful enemies).