I am talking about Sonic XD. I have the source. I have the game. I can give a little example. When you glide fly with Knuckles and release the button, drx's Knuckles will fall with a wierd gravity and with no animation. When you jump with drx's Knuckles, and run with drx's Knuckles it feels like you are playing Sonic Spinball. I basically made that thread in the Sonic programming forum about following the rules of the Sonic engine for a reason you know. You can actually destroy Sonic by doing the programming youself. Esrael is an example yet again, where some stuff in his Delta games are dealt with Esrael style and not Naka style, but Esrael has always been good at programming, and in Sonic thinking. Some people aren't good, but still want a piece of the Sonic engine. Thanks to IDA pro, anyone can actually take the source of any Sonic game, and mess it up, release it on the internet, and give Sonic bad publicity. Stealth made it right, and has always made it right, so thanks god he was the one who released Knuckles in Sonic 1 first.