Here are some cheats and tips for the game Sonic 3D Blast.
Level select:
Press B, A, Right, A, C,
Up, Down, A, Start when the phrase
“Press Start” appears on the opening screen. The level
selection screen will be displayed when game play begins.
Level skip:
Enable the “Level select” code. Pause game play
and press A to jump to the next level.
Fast emeralds:
Enable the “Level select” code two times. Select
any stage that features Tails or Knuckles (such as stage 1). Accumulate
fifty rings and visit Tails or Knuckles. Press A + Start
when the special stage starts for the emerald.
Extra lives:
Accumulate fifty rings, enter the special stage, and get the
emerald. Lose your current life, accumulate another set of fifty
rings, and re-enter the special stage. Give the rings to the same
character used the first time the special stage was entered. The
same stage where the emerald was awarded will re-appear. Complete
the stage for an extra life. Collect 100 rings for another extra
life. Lost your current life and repeat this procedure.