Conker's Bad Fur Day

Hidden 10 Lives
In the Barn Boys area go over to where the cheeses were fenced in and jump up on the surrounding cliffs. Now jump from cliff to cliff, then when you are jumping over the cliff near the very back the light bulb should appear over your head as soon as it does Press B. Conker should then turn into an anvil and destroy the cliff go inside and get the tail off the hook for ten extra lives.

At the Cheats Menu enter
Code                Effect
DRACULASTEABAGS     50 Lives
SPUNKJOCKEY         Matrix Style Decapitation In Multi Deathmatch Cheat
EASTEREGGSRUS       Access Matrix Conker "Neo" In Multi Deathmatch & Race Cheat
WELLYTOP            Access Conker In Multi Race & Deathmatch Cheat
EATBOX              Access Cavemen In Multi Deathmatch
CHINDITVICTORY      Access Weasels In Multi Deathmatch & Race Cheat
BEEFCURTAINS        Access Zombies & Villagers In Multi Deathmatch & Race Cheat
RUSTYSHERIFFSBADGE  Access Sergeant & The Teddiz Leader In Multi Deathmatch & Race Cheat
BILLYMILLROUNDABOUT Access Gregg The Grim Reaper In & Out Of Robe In Multi Deathmatch & Race Cheat
PRINCEALBERT        Access Barn Boys In Chapters Mode Cheat
CLAMPIRATE          Access Bats Tower In Chapters Mode Cheat
ANCHOVYBAY          Access Sloprano In Chapters Mode Cheat
MONKEYSCHIN         Access Uga Buga In Chapters Mode Cheat
SPANIELSEARS        Access Spooky In Chapters Mode Cheat
BEELZEBUBSBUM       Access It's War In Chapters Mode Cheat
CHOCOLATESTARFISH   Access The Heist In Chapters Mode Cheat
WELDERSBENCH        Access All Chapters & Scenes In Chapters Mode Cheat
DUTCHOVENS          Frying Pans In Race Mode Cheat

Debug Mode
Instructions as explained by those two master bat hackers XAnimal & Parasyte:
At the Cheats Menu enter XFYHIJERPWAL IELWZS
Now start a game, you can be in a cutscene or whatever just not the main menu/lobby area. Now grab the left side of your cartridge and slowly start lifting the left side out. About halfway (you'll know when you get there) the music will get a little garbled...Wait..As soon as Numbers start appearing on the screen push the cart back down and push the A button. If you take too long you'll have to start all over again. Or if you lift the cart out too much you'll get a black screen.
Disclaimer: You probably won't #%*$ up your game using this code but if you do it's your own damn fault :)