Cheato is Gruntildas magic spellbook.
In Banjo-Pilot, Cheato is responsible for giving out extra features. They can be purchased if any of his Cheato Pages are found.
In Banjo-Tooie, Gruntilda had carried out her plan of ripping out his pages. If spoken to in Gruntilda's Lair, Cheato will ask you to find his missing pages. For every five Cheato Pages that are found, Cheato will give you one cheat. The cheats may only be entered in the Code Room in Mayahem Temple.
Cheato makes a cameo appearance in Nuts and Bolts. He is in Banjoland as an exhibit. His main (and only) use in the game is being a bridge.
RED FEATHERS - In the lava room, follow the small winding path to a small tunnel as the Pumpkin.
GOLD FEATHERS - In the Rusty Bucket Bay entrance, raise the water level to 3 and then make it to the small alcove before time runs out.
FEATHERS - Doubles the maximum amount of all feathers
EGGS - Doubles the amount of every egg type
FALLPROOF - Does no damage from falling from heights
HONEYBACK - Gradually restores Honeycombs that were lost
GETJIGGY - Allows you to read the signs in Jiggywiggy's house
HOMING - Fired eggs will home in on targets
NESTKING - Unlimited eggs and feathers