99 Lives:
While playing press: L1, R1, X, Circle, Circle, Triangle, Square, R1, L1

Spyro The Dragon demo:
Press Up, Up, Down, Down, Left, Right, Left, Right, Square at the title screen.

Hot Cold bonus level:
Go to Level 14 and ride about half way through the level to find alien crossing sign on the left hand side. Run into the sign to be transported to level 31.

Eggipus Rex bonus level:
Go to Level 11 and take the yellow gem ride. Continue until reaching the area where the huge dinosaur chases Crash. Allow the second pterodactyl capture Crash to reach level 32.

105% completion:
Collect all relics and gems, including those from the Hot Cold and Eggipus Rex bonus levels. The relics that are collected must be at least gold or platinum. Then, approach Crash's sister, next to the save spot, to find another clear gem. Take the gem to view a very nice fireworks display and finish with a 105% completion status.

Infinite life and all the relics for the time trial:
Defeat the first stage completly including all the hidden levels. Save it and then play a different game and beat the last level and overwrite it on the first file. Then you will notice that you have 100% completion of the game with all the relics and hidden level including infinite life.

Bonus Levels (26-30):
To get to the Bonus Levels you must aquire 5 relics, which you get by beating the time trails. For each level you must have a certain number of relics to enter (increments of 5).

Instant Uka Uka (PAL):
(submitted by: MadHaTTeR)
Press Triangle + Circle + X + Square. Note: This may only be done once per life.

Easy lives:
If you are running low on lives, repeat the first level again and again.

Five extra lives location:
Begin game play on level 11 and take the yellow gem ride. Go all the way to the end, and use a double jump over the yellow gem. Then, use a double jump to cross over the steel wall to find five lives.

Extra life at jet ski levels:
Go on a jump and land on one of the pirates in a boat for an extra life.

Three extra lives in "Tell No Tales":
Go behind the second big pirate ship in "Tell No Tales". Follow the yellow balls until seeing two that are farther apart than the rest. Move between them, then go straight until the extra lives appear.

Cortex's secret place:
After completing the game, use the Speed Shoes obtained from Corex and collect five relics. Then, go to the middle of the space ship and watch what appears.

Quicker exit:
After pausing game play, press Select to return to the Warp Room instead of highlight "Warp Room" and pressing X.

Find the Colored Gems:
Green Gem Level 23 Flaming Passion:
Take the hard path.

Blue Gem Level 20 Tomb Wader:
Take the hard path.

Yellow gem Level 7 Hang'em High:
It shows the yellow gm on this level but you must actually get the secret warp zone and go into level 27 to aquire it.

Red Gem Level 12 Deep Trouble:
To get the red gem you must go to the end of the level and then you must hit the ! box at the end. Once you have done this go back down the tube and to the right tap the TNT box to set it off and then go through to get the red gem.

Purple Gem Level 13 Hang High: