Frogger 2: Swampy's Revenge (Dreamcast)
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All, characters unlocked
Pause game play, then hold X and press Left, Right, Left(3), Up, Left(2).
Extras and bonus levels, unlocked
Pause game play, then hold X and press Right, Up(2), Down, Right, Down, Right.
Level select
Pause game play, then hold X and press Up, Down, Left, Right(3), Down, Left.
Level skip
Pause game play, then hold X and press Right, Left, Up(3), Right, Left(2).
Temporary invincibility
Pause game play, then hold X and press Left(2), Up, Left, Down, Right(3).
Turn coins into Mad Garibs
Pause game play, then hold X and press Right, Left, Right, Left, Up(2), Left, Right.
Unlimited lives
Pause game play, then hold X and press Down(2), Up, Down, Right, Down, Up(2).