Codes:
At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter LIVES - 50 Lives

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter WATER. - Enter first Waterfall (85 Bonus Coins)

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter ASAVE - Auto Save

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter MERRY - Christmas bonus games

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter COLOR - Color Switch

At the game over screen press, L,R,A,B,X,Y. - Continue Game Over Music

At the Select Game menu, highlight a saved game and press L,R,R,L,R,R,L,R,L,R then enter ERASE - Erase Times

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter HARDR - Extra Difficulty

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter MUSIC - Dixie Kong's Music Test

At the Game Over Screen, wait for the song to stop playing, then you can play with the blocks by pressing L, R, X, A, B or Y - Play with Blocks

At the Select Game menu, highlight a saved game and press L, R, R, L, R, R, L, R, L, R then enter TUFST - Super Difficulty Level (No Continue Barrels)

Unlock Lost World:
To unlock Lost World, using the jet ski or hovercraft, swim several clockwise circles around four rocks (On the first section of the map) for as many times as you can, until Lost World forms.