Banjo-Kazooie

Cheatcodes:
To enter the following codes, type in "CHEAT" at the sand castle (Treasure Trove Cove).
You will not hear an indication sound until you type in the whole code after CHEAT,
and then you'll hear a bull moo.

NOWYOUCANFLYHIGHINTHESKY - This gives you infinite Read Feathers.
DONTBEADUMBOGOSEEMUMBO - This gives you infinite Mumbo Tokens
BANJOBEGSFORPLENTYOFEGGS - This gives you infinite Eggs
ANENERGYBARTOGETYOUFAR - This gives you maximum energy
GIVETHEBEARLOTSOFAIR - Unlimited Air (underwater)
LOTSOFGOESWITHMANYBANJOS - Infinite Lives
AGOLDENGLOWTOPROTECTBANJO - Infinite Gold Feathers

To cancel these codes, enter the code NOBONUS.

Kill the Bees:
This trick is a simple but easy way to get rid of the bees that try to attack Banjo after you destroy the beehives containing valuable honeycombs in the later stages of the game. Simply destroy the hive and then use the "Wonderwing" (Press and hold the Z button and then then the right arrow) after destroying the hive and watch the bees fall to the ground.

Big Hands and Big Feet:
If you play the same game but on a different challenge(on the Bottles picture in Banjo's home), Bottles will tell you to go back to the Sand Castle in Treasure Trove Cove, spell out BOTTLESBONUSTWO. Banjo will have Big Hands and Big Feet! To reverse it, spell NOBONUS.

200 Egg max:
Behind the entrance to Bubblegoop Swamp, you will see a cave, go in it as Banjo and Kazooie wearing the boots that let you walk in the swamp without getting hurt. In there, you will see the Picture of Freazeezy Peek with missing Jigsaws. Turn to the left, go up the slope, the Beak Bust the Ice that's covering a cave. Then return back to Bubblegoop Swamp, become an Alligator, go back out and go in the cave(the cave is too small for Banjo and Kazooie to fit). When you go in, you will find a book called Cheato. He will tell you to spell out BLUEEGGS in the Sand Castle(Treasure Trove Cove). Spell it out, and he will give you 200 Eggs, and 200 will be the maximum Eggs that you can have instead of 100.

Big Head Banjo:
Go up to the Bottles picture above the fireplace in Banjo's Home. Hit Top-C and look at the picture. Then hit R to talk to Bottles. If you have the Jiggy from the sandcastle in Treasure Trove Cove, you can play a minipuzzle game. You have to put together the puzzle and then go back to Treasure Trove Cave. In the sandcastle, spell out BOTTLESBONUSONE. Banjo will have a big head. Spell NOBONUS to reverse it.

Secret Items:
Beat the entire game with all 100 jigsaw pieces and Mumbo will show you secret items in the game but he won't tell you what they're for or how to get them.

Extra Life on of Banjo's house:
Get to the top of Banjo's house by doing a sommersault and then jump on top of the chimney. Jump as high as you can and touch the the golden statue of Banjo, resulting in an extra life. There's another extra life behind the waterfall.

Cheat Books:
Red - located in the area outside the graveyard that leads to Mad Monster Mansion. First you must have Mumbo Jumbo turn you into a Pumkin. Then exit the level. Travel out of the graveyard and into the reddish area in which the puzzle for Gobi's Desert is located. Travel up the narrow path to your left and up to the small platform with Grunty's sister. There is a hole just big enough for you to fit through. Inside you will find Cheat Book #2. The requirements to use the code are the same as above.

Cheato's First Spell Book - To enter Cheato's first lair, go into Bubblegloop Swamp and find Mumbo's Hut. (To find Mumbo's hut, go above the gator's head into the maze and you'll have to find his hut.) He will transform you into a gator. Now exit Bubble Gloop Swamp and go into Gruntilda's lair. Try to go BEHIND the entrance to Bubble Gloop Swamp. If you successfully go behind puzzle to Bubble Gloop Swamp, you'll find Cheato the Spell Book.

Cheato's Second Spell Book - Go to the level MAD MONSTER MANSION. Change to the pumpkin and go to the platform that BRENTILDA is on, go through the little hole and get the red spell book. Then go to the BANJOKAZOOIE puzzle in TREASURE TROVE COVE then enter REDFEATHERS to get 100 feathers and a maximum of 100.

Cheato's Third Spell Book - To find Cheato's 3rd spellbook, you have to have the water risen to the 2nd level before you can race to the lair. Find the switch to raise the water to the third level (behind a grated pathway behind the 460 note door when the water has risen the first time.) Go through the door then immediately dive down in the water and go to the Rusty Bucket Bay area and swim to the top after coming out and look for a staircase and that will lead you to the lair. Note: After hitting the switch to raise the water to the third level, you'll only have 30 seconds to get your furry hide to the lair.

Secret Room in Monster Mansion:
In Mad Monster Mansion there is a secret room outside the Church. Look at all the stain glass windows outside the castle and the one with a picture of Banjo and Kazooie jump into it.

Rusty Bucket Bay Whistle Combination :
The combination for the whistle game in Rusty Bucket Bay is 312-111.

Refill Eggs, Red Feathers, and Gold Feathers At Once:
Once you have all 3 Cheato book codes, you can go to the floor of the Sandcastle and enter these letters to refill everything all at once: BLUEREDGOLDFEATHERS

Less Damage From A Fall:
To take less damage from a fall, press B just before you land.