Master Core (マスターコア Masutā Koa?) is a boss in Super Smash Bros. for Nintendo 3DS and Wii U. It is the final boss of the game's Classic Mode and Master Hand's true form when it is played on 5.1 intensity or higher. In addition, the black path must be taken during the fight; taking the blue path will only have a fight with Master Hand. If playing on intensity 8.0 or higher, the black path will be the only one available, meaning that a fight with Master Core is mandatory.