The following are known Action Replay Codes for Gex 3: Deep Cover Gecko on Sony Playstation (PS1).

The codes should work with the region specified but may work for other regions as well.

Device Compatibility: Action Replay, CodeBreaker & GameShark

Extra Flies
d00aa5d40001
800aa5d40032

Invincibility
800b37b80005

Press X+R2 To Float
d00b0afabdff
800a290c0011

Press X For Raising Jump
d00b0afabfff
800a290c0040

Have Flies
800a219c000a
800a219e000a

Have Remotes
800a21bc000a
800a21be000a

Have Bonus TVs
800a21ac000a
800a21ae000a

Have Paws
800a21cc000a
800a21ce000a

Have All Remotes
500005020000
800aa5acffff
300aa5b600ff
300aa5c30002
800aa5c40202
300aa5c60002