If i remember correctly, they never actually brought up how she returned. She was killed in KH1, and comes back in KH2, but no one ever says HOW EXACTLY SHE DOES COME BACK!!! Seriously, they just dropped that completely. They just brought her back for her to save Sora once and for Pete to have a role in the game that affects the story some what. THAT'S IT. Seriously, i was pretty dissapointed with what they did with her in KH2, she should've just stayed dead honestly.
If i remember correctly, they never actually brought up how she returned. She was killed in KH1, and comes back in KH2, but no one ever says HOW EXACTLY SHE DOES COME BACK!!! Seriously, they just dropped that completely. They just brought her back for her to save Sora once and for Pete to have a role in the game that affects the story some what. THAT'S IT. Seriously, i was pretty dissapointed with what they did with her in KH2, she should've just stayed dead honestly.