Nega Eggman may be. Let him and Jimbotnik fight each others.
I imagine Jim Carrey would play both roles with some camera trickery.
A fan game. Still not finished yet though.
A long-long time a go, I once made my own KH fan character who consist of a self-insert of me, NiGHTS for the role of mage and Mighty the Armadillo for the role of guard. Over time, I ditched the Sega-stuff and made it back to Disney/Square-related stuff but by then I outgrew Kingdom Hearts for any use for my Esuna Town characters.
Still could be pter games though, like .... may be Yakuza games?
Yeah, but we prefer reasonably priced games.
Isn't KFC Recipe a secret too? Yet, it's safe for consumption.
It if someone offers you food and you ask "what's that peculiar flavour?" and they say "It's a secret" then they probably added their own special sauce to the recipe.