KH2 - Double Sephiroth fight? ?

Question

I've seen someone on Youtube play Kingdom Hearts 2. They were in the Audience Chamber of Disney Castle. They were fighting two Sephiroth clones. Each of them had 50% of the real Sephiroth's HP. And in the background there was the final boss music from Kingdom Hearts 1. How do you get into this fight?

Answer 1

That person used action replay and codebreaker codes.  What they did was use a character modifier code to modify Sephiroth into a certain area.  These things can be done with almost anything.

Answer 2

They use codes and cheats to do that. Just search for Kingdom Hearts 2 cheats and codes to find out which.