SRB2 Help

HI, I'm new to SRB2, and was wondering if someone could help me with the game. Here are my questions:

1) How do I unlock supersonic. I have got all emeralds with knuckles and tails.
2) Are there any chaets, if so what are they.

Uh, you don't really "unlock" Super Sonic. You get him by doing this amazing thing called getting all 7 emeralds, 50 rings, and double jumping, just like the old games. The emeralds do not save.

There are codes, you just have to type them into the console command window. To access it, press the ~ key in the middle of a game. I won't tell you any codes though.

I have a file that will instantly unlock all the secrets, save the E***** E** B**** (The secret that people usually have the most trouble with; I just like torturing them. ), but I'll only give it to you if you're incredibly desperate and can't do it on your own. Of course if you couldn't beat the normal game, you probably couldn't win the special stuff either...

Note: the asterisks are just so I don't give the secrets away.