Bonus points:
After completing the game, watch all of the credits. You will be rewarded with 200 bonus points.

All Artifact locations At Ceylon:
Idol Of Ramba Vihara=Gates Of The Lost City
Mahavatu Mask=The Hunter's camp
Port Negombo Relic=The Palace Of Forgotten Kings.

CheatCodes:
At the Code Input Screen enter the following codes:
Get 5,000 Smash Points - SMASH5
Get 10,000 Smash Points - SMASH10
Get 15,000 Smash Points - SMASH15
Double Value of Health Pickups - BRINGIT
All Vehicles Become Taxis - CABBIES
Black and White Graphics - RETRO

Fast money:
At the options screen select "Simulation". Once you have gained your racing license and have a decent car, select the "Racing Calendar" option. Select the "Single Player" option, defeat your opponent, and you will gain 0. You will then be asked to either "Restart" or "Exit To Menu". Select "Restart", then just race, win, and repeat as many times as desired to get as much money as needed.

Unlimited pebbles:
Pause game and press: Down, Down, Left, Up, Up, Right, Up, Down.

Unlimited health:
Pause game play, then press Up, Right, Down, Up, Left, Down, Right, Left.

Unlimited energy:
Pause game play, then press Down, Left, Right, Down, Down, Right, Left, Down.

Unlock Battle Arena:
To Unlock Battle Arena, earn all the Grades, Then you should get the Master Grade. The Battle Arena Will be open at Robot Beach.