Time Rush:
     Press  Start  and  then enter: Down, Down, Up, Down, Right, Left.
Time rush will be available when you press Select.

Tom gadget:
     Press  Start  to  pause  game  play, then press Left, Left, Down,
Right, Left, Right. 

Spy Fiction Unlockable List:
Successfully beat the game with Billy to unlock the 3rd costume.
Successfully beat the game with Sheila to unlock the 4th costume
Successfully beat the game to unlock Scarface Mode and the special option.
Successfully beat the game twice to unlock a second ending.