Extra Rings
go to the options screen change the ring to turbo and hit R1,R2,R1,R2,SELCT and you should hear a noise every time you hit SELECT
No Title Hassle
At the main screen (where it says options and start game.) enter the following code R1,R1,R1,R1,L1,L1,L1,L1,R2,R2,R2,R2,L2,L2,L2,L2. A sound should confirm the code. Then start the game choose the option go down a few blocks and then you will see the secret charecters. No title hassle at all.