Evolution of Kyo's moveset?

I see so many different moves and style for Kyo in all the games, and now I’m getting confused. There are no dedicated videos or topics on the net that I can find about this.

The closest thing so far is this video showcasing the evolution of his super moves. (Also, how to embed videos here?)

There’s only two main versions of Kyo really. Fireball Kyo and Rekka Kyo. Things kinda got bastardized in 02 with the clone army, but they aren’t really important to know.