How do you get double score mode in cups on kingdom hearts 2?

To unlock Double Score mode in the Cup tournaments in Kingdom Hearts 2, you need to defeat the necessary bosses and complete certain requirements in the game. Specifically, you must defeat all of the Tournament Cups in the Coliseum, which includes the Hades Cup. Once you’ve accomplished that, you can activate Double Score mode by selecting it in the Cup menu before starting a tournament, allowing you to earn double points for your performance.