' is the second game in the series for Game Boy Advance. It was released in Japan on November 11, 2004 and in North America on December 7, 2004. In the game, Sora arrives at Castle Oblivion and visits each recreations of aforementioned worlds. Each are on different floors, and the old memory is replaced by a new ons. When Sora forgets Kairi, she is replaced by Naminé. Sora meets Organization XIII, the enemy group attempting to erase his memory. Naminé puts Sora to sleep, in order for him to restore all memories for the next year. While following the same path like Sora, Riku attempts to control his ego under Ansem's influence. ' is a reissue of the game made for PlayStation 2. It has additional cutscenes and battles. It was released together with "Kingdom Hearts II Final Mix +" in Japan on March 29, 2007, and was released as a standalone title in North America on December 2, 2008.