 Due to the technological limitations of the Game Boy Advance cartridge size, voice acting was kept to a minimum. Though many characters from Kingdom Hearts were voiced by the cast from before, the Japanese version used the following voice actors: Keiji Fujiwara as Axel; Tatsuya Kando as Vexen, Marluxia, and Lexaeus; and Rieko Katayama as Larxene. A limited amount of voice acting was added only for the battle sequences. Voice clips from the first Kingdom Hearts were inserted into Chain of Memories. The English version is absent of dialogue; voices during Organization battles are replaced with simple grunts, laughter, and other battle cries.
