Play as Eric Golem Jr.
     Collect 50 Gold Coins to unlock Eric Golem Jr.

Play as Eddie
     Collect 60 Gold Coins to unlock Eddie.

Play as Spurtz
     Collect 30 Gold Coins to unlock Spurtz, Pi's friend.

Play as Lars
     Collect 40 Gold Coins to unlock Lars.

Bonuses
     Get  750  on  the  Shooting  Gallery  and  The  Brains  That  Ate
California for two Gold Coins and two episodes of Rocket Power.

Play as Pi
     Collect 20 Gold Coins to unlock Pi.

Level Select
     Go  to the options menu and choose "Cheats". Answer the series of
seven questions with the following to unlock all levels:

1. Squid 
2. Conroy 
3. Tito Makani 
4. Maurice 
5. Ocean Shores 
6. Otto 
7. Eddie:Prince of the Netherworld