The following list of codes lets you remove or change obstacles throughout Grunty's Lair. The cheats range from opening doors to raising the water level near Rusty Bucket Bay. Enter the codes in the sandcastle in Treasure Trove Cove (after spelling CHEAT):

Raise the two pipes near Clanker's Cavern:
BOTH PIPES ARE THERE TO CLANKERS LAIR

Raise the big pipe by Clanker's Cavern:
YOULL CEASE TO GRIPE WHEN UP GOES A PIPE

Open the passage near Clanker's Cavern leading to Click Clock Wood picture"
ONCE IT SHONE BUT THE LONG TUNNEL GRILLE IS GONE

Make the Click Clock Wood Jiggy podium appear:
DONT DESPAIR THE TREE JIGGY PODIUM IS NOW THERE

Open the grill blocking the Rusty Bucket Bay picture"
THE GRILLE GOES BOOM TO THE SHIP PICTURE ROOM

Open the grill inside the giant Witch Statue (near Bubblegloop Swamp):
SHES AN UGLY BAT SO LETS REMOVE HER GRILLE AND HAT

Remove the ice cube blocking the Freezeezy Peak picture:
ITS YOUR LUCKY DAY AS THE ICE BALL MELTS AWAY

Remove the cobwebs that block passages:
WEBS STOP YOUR PLAY SO TAKE THEM AWAY

Smash the Grunty statue's eye close to Mad Monster Mansion (to get to Jiggy):
GRUNTY WILL CRY NOW YOUVE SMASHED HER EYE

Raise the water level near Rusty Buck Bay:
UP YOU GO WITHOUT A HITCH UP TO THE WATER LEVEL SWITCH

Remove the gate that blocks the way to the crypt near Mad Monster Mansion:
YOU WONT HAVE TO WAIT NOW THERES NO CRYPT GATE

Remove the lid of the coffin in the crypt:
THIS SHOULD GET RID OF THE CRYPT COFFIN LID

Remove all breakable walls:
THEY CAUSE TROUBLE BUT NOW THEYRE RUBBLE