Aku Aku Mask  -  After losing a life, hold Up + Circle until Crash moves. Release the buttons when Crash loses his second life.

(Note: While in a warp tunnel, Press X (twice) before holding X + Up. Release the buttons when Crash loses his second life.) 

Area Warps 

RED GEM to find the red gem you must play level 7, Air Crash. When you come to the first jet board don't get on it, instead jump on the first box you see and bounce off it onto another box. You will see a platform bounce onto it and you will warp to the secret warp room with a portal to level 2 Snow Go open.

AIR CRASH GEM to get all the boxes in Air Crash, you must get to the Third warp room and play Level 13 Bear Down. At the end, when the bear throws you of its back over a frozen lake, go back. Jump across the small tinted ice flows, and onto the large white one. You will warp to the secret warp room with the portal to Air Crash open.

TOTALLY BEAR To access level 26, Totally Bear, play level 15 Unbearable. At the end the baby bear will throw you over a pit. Slide-jump back over the pit, and walk to where the bear is sitting. When you get there you will go to the secret warp room with Totally Bear open.

TOTALLY FLY To access level 27 Totally Fly,play level 16 Hangin' Out. When you fall into the water with the crystal, go backwards instead of forwards you will fall into a hole. Play this area and you will warp to the secret warp room with Totally Fly open. 

Extra Lives  -  There are several ways to earn extra lives. One way is to whack bees. Another way is to jump on the polar bear’s head in the second warp room (level 6-10). 

Gems 

Blue Gem  -  Located within level 1 (Turtle Woods), the sapphire is the reward for completing the level without breaking any crates. (Note: Before getting the blue gem, Crash first must possess a silver gem, the reward for breaking all of the level’s crates!)

Clear Gem  -  Tourmaline gems are located on level 7 (Air Crash), level 14 (Road to Ruin), and level 17 (Digin’ It). To find them, jump onto objects with the skull-n-crossbones tattoo.

Green Gem  -  The emerald is within level 10 (The Eel Deal). To find it, take the right branch (the one without Wumpa Fruit) at the fork in the tunnel. Walk to the far wall, manoeuvering around boxes of TNT, and jump through it.

Purple Gem  -  The amethyst is within level 20 (Bee-Having). To find it, climb the boxes of TNT opposite the chasm beyond the checkpoint.

Red Gem  -  The ruby is within level 2 (Snow Go), however it is only accessible from the Warp World Entrance found in level 7 (Air Crash).

Yellow Gem  -  A topaz is the reward for finishing level 11 (Plant Food) before time runs out.

Playing Tip for Totally Bear  -  When playing Level 26, Totally Bear, use the long jump (O or R1 button and X button) when riding the bear. This allows you to jump farther than on regular bear levels like Bear It and Bear Down. Without the long jump, you can't get past any of the jumps. 

Revisit Boss Stages  -  To revisit a boss stage, stand on the middle platform of a warp room. Then hold the shoulder buttons (L1 + L2 + R1 + R2) and when Crash points, press Triangle, Up. 

Secret Room  -  In level 16, "Hangin'Out", there are holes you can go in. Go inside the 2nd one. You will land in water. Go backward until you find another hole jump in it and you will find a secret room with several lives in it. 

Sub-levels 

Turtle Woods Sub-level  -  The Turtle Woods bonus is accessed in level 1 (Turtle Woods). Belly flop onto the octagon with a menacing face.

Snow Biz Sub-level  -  The Snow Biz bonus, located in level 6 (Snow Biz), is opened when Crash obtains the Red Gem in level 2 (Snow Go).

Sewer/Later Sub-level  -  The Sewer/Later bonus, located in level 12 (Sewer/Later), is opened when Crash obtains the Yellow Gem found in level 11 (Plant Food).

Unbearable Sub-level  -  The Unbearable bonus is accessed in level 15 (Unbearable). When the first polar bear falls from the bridge and into the pit, follow him.

Cold Hard Crash! Sub-level  -  The Cold Hard Crash! bonus is accessed in level 18 (Cold Hard Crash!). Half way through the level, jump onto the object bearing a skull-n-crossbones tattoo.

Ruination Sub-level  -  The Ruination bonus, located in level 19 (Ruination) is accessible when Crash obtains the Green Gem in level 10 (The Eel Deal).

Unlimited Lives  -  Go to the secret level in UNBEARABLE. At about the halfway point there is a bouncing box and an arc of fruit. Go to the highest step and super jump up to find two extra lives. Get both of them and kill yourself. Return to that spot for 2 more lives. Repeat as many times as you want!