Which Kingdom Hearts game follows Roxas during his time in Organization XIII?

Kingdom Hearts 358/2 Days follows Roxas during his time in Organization XIII. The Nintendo DS game begins after Roxas becomes the Organization’s thirteenth member and chronicles his daily missions, friendships, doubts, and eventual break from the group.

Roxas is Sora’s Nobody, created when Sora briefly becomes a Heartless in the first Kingdom Hearts. Because Roxas can wield the Keyblade, Organization XIII uses him to defeat Heartless and release the hearts they contain, advancing its plan to create an artificial Kingdom Hearts. He is placed under Axel’s watch and later becomes close friends with Axel and Xion, the Organization’s fourteenth member.

The title is a prequel to Kingdom Hearts II and leads directly into Roxas’s appearance at that game’s opening. It is often confused with Kingdom Hearts II because both feature Roxas and Organization XIII prominently. Birth by Sleep instead follows Terra, Aqua, and Ventus years before the original game, while Kingdom Hearts coded centers on a digital investigation into the journal’s mysterious message.