Turn into DracuGex Without A Code  -  Just before you enter the level "Clueless in Seattle" you will find a painting of DracuGex. Look at it with C-Up. you will then turn into DracuGex for 30 seconds. This will help you get the bonus and paw coin across from you.

Vault codes:-  To enter the following vault screen passwords, play the hidden level and get all four vault "secret" keys. The passwords are entered at the vault screen.

Eight Hit Paws  -  Enter Square, Diamond, Triangle, Triangle, Star, Diamond as a password at the vault screen. 

Extra life  -  Enter Triangle, Circle, Star, Square, Square, X as a password at the vault screen. 

Ten lives  -  Enter Square, X, Circle, Circle, Triangle, Square as a password at the vault screen. 

Invincibility  -  Enter Square, Star, Triangle, Square, Triangle, Diamond as a password at the vault screen. 

Toggle timer  -  Enter Square, Square, Diamond, Circle, X, X as a password at the vault screen. The timer may be turned on or off at the "Extras" screen. 

Play as Alfred  -  Enter Square, X, Triangle, Square, Star, Star as a password at the vault screen. This is no longer effective after you leave Gex's HQ. 

Play as Cuz  -  Enter Square, Diamond, Square, Square, Triangle, Diamond as a password at the vault screen. This is no longer effective after you leave Gex's HQ. 

Play as Rex  -  Enter Square, Star, Star, Square, Triangle, Triangle as a password at the vault screen. This is no longer effective 
after you leave Gex's HQ. 

Play as DracuGex  -  Enter Star, X, X, Circle, Square, Triangle as a password at the vault screen. This is no longer effective after you leave Gex's HQ. 

View FMV sequence  -  Enter Circle, Triangle, Square, Star, Diamond, Star as a password at the vault screen. 

View FMV sequence 2  -  Enter Diamond, Star, Square, X, Triangle, Circle as a password at the vault screen. 

View FMV sequence 3  -  Enter X, Diamond, Star, Triangle, Triangle, Circle as a password at the vault screen. 

View all FMV sequences  -  Enter Star, X, X, Circle, Square, Triangle as a password at the vault screen. 

Level select  -  Enter Square, Circle, Circle, Triangle, X, X as a password at the vault screen. 

Gex quotes  -  Enter Square, Triangle, X Star, Square, X as a password at the vault screen. Press Start to hear various comments from Gex. 

Debug menu  -  Enter Square, Square, Diamond, Circle, X X as a password at the vault screen. Press Start to enter the debug menu. 

Status Password 

First part complete DPXMDGVXCVLCG5WFL 
First and second parts complete C2G57FLRDQJV7FBTCN 

Hints:- 

Getting the extra remote:-  Four remotes need to be collected to complete a level. Since there are only three missions, only three remotes can be found. The fourth remote must be earned by collecting 100 flies. 

Extra pawprints and extra lives: -  TVs are placed throughout The Pole and other levels. Hit a TV and swallow the green bugs to get extra pawprints. Swallow the red bugs for extra lives.

Getting help:-  Tailwhip the turtle to get various tips during the game.

Defeating Evil Santa:-  Hit the presents that Evil Santa throws back at him. Be very careful doing this, as it is easy to miss and get hurt. You only need to hit him three times. There is a TV in the spot where you face Evil Santa. Wait until Gex is down to one or 
two pawprints. Then hit the TV and swallow the bug that appears for an extra pawprint.

Getting extra lives in The Pole:-  Hit the Mailboxes, Elves, Soldiers, Penguins, and Presents to get flies. Collect fifty flies to get an extra life.

Skating elf:-  Hit the first skating elf in The Pole level and a pawprint will appear in the sleigh.

High jumps:-  Jump on the presents in The Pole level to get an extra high jump.

Other flies in The Pole:-  To get more flies, return to the gate used to enter The Pole. There will be about eight flies here. When entering the gate, jump on the first present in view (not the moving presents). Gex will get an extra high jump and land on the rooftop. There are four flies located here.

Extra life bug in The Pole:-  After Gex jumps on the house and get the files, go to the nearby cliff on the left. Keep moving until an indentation appears in the wall. There is a "Scenic View" sign at that location. Go to the end of it to find a TV with an extra life 
bug.

Bonuses at The Pole:-  Go up the cliff that is visible when you enter the Pole to see the roofs of houses. Jump down the chimneys to find a few extra surprises. 

Snowboarding tricks in The Pole: 

360  -  Press B to do a tailwhip while jumping. 

Nose grab  -  Do a flying kick (hold R and press A.) 

360 nose grab  -  Get a large running start and do a 360 and nose grab. You cannot do them at the same time, but can get them both in one jump. 

Hints:

Training bonus:-  After completing training, you will get a bonus and another door will open in the Gex Cave.

Bonus Gex Cave items:-  There are four glass walls protecting items on the top level in the Gex Cave. Jump up and kick the glass to collect them. Note: This may require a few jumps in order to get correct timing to break the glass.

Extra lives and Rex:  -  Locate the Scenic View bridge by entering into different sections of the level until finding the place with two guards before another passageway to another section. Jump on the present right next to them to reach a ledge with a TV and the 
turtle. Push Rex over the edge, then jump down and push him into the fire. He will thaw out, and Gex will receive extra lives.

Game Shark Codes 

Infinite Lives 810A54D6 0064 
Infinite Health 810A54DA 0005 
Have 99 Flies 810A54DE 0063 
Have 99 Paws 810A54E2 0063 
Have 99 Coins 810A54E6 0063 
Have 99 Remotes 810A54EA 0063