Sonic's Secrets: Beauty & the Beast - Roar of the Beast.
At the second title screen, press:
Up, Right, A, B, A, Down, Left, A, Down, B, Up, B, B, A.
The "Start Game" screen will then appear, when you press Start the level select screen will then appear. (see right)
Once you have begun play you can then skip a level by pressing & Holding A+B+C.