Banjo-Kazooie

have all secret eggs etc. [©]
81283220 FFFF

disable all secrets (eggs can not be accessed whatsoever)
81283220 0000

press L for moonjump [©]
d0285735:0020
8137ce8c:43e0

more notes [NOTE #1]
803869db:0064

your lives will count down [NOTE #2]
e88ec019:ffff
e88ec01f:ffff

"Karpador" [NOTE #3]
e88ec0c4:ffff

beta-displays [NOTE #4]
e88ec0XX:ffff

no time
e88ec068:ffff

very much time
e88ec067:ffff

infinitive time
e88ec066:ffff

BETA-MUSIC [NOTE #5] [©]
812816ba:00xx

NOTE #1:
Collect one note to activate.

NOTE #2:
For some reason, the game will count down your lives - even during the savegame-selection!

NOTE #3:

Banjo will gasp for air... He can hardly move, maybe jumping is posible in combination with pressing Z.

The cool effect of this code is, that during demo-mode Banjo will drown in perfectly fresh air while being in click-clock-wood.
Therefore Banjo automatically will exit the level and you can control him! You better shouldn´t save, since Banjo has neigher notes nor puzzelos nor anything else.

NOTE #4:
Replace XX by 89, 91 or 81 for different effects.
I cannot recall Banjo carriing cristmas trees as a whole - and where do you get this Mumbo-Jumbo-clock?

NOTE #5:
Replace XX for some really cool beta-soundtracks.
I clearly doubt there to be any other beta-sound, since I checked EVERY SINGLE TONE OF THE WHOLE GAME!

4d - Mumbo´s Raindance
39 - Advent
44 - Click Clock Something
3f - ?-up
40 - ?-down
3e - Tooie-Torpedo-soundeffect from Banjo-Tooie!
37 - unknown complete
38 - Church komplett!
0f - Crazzy Church
12 - PARTY @ TROVE COVE!
07 - Clancer´s RACE!
17 - unknown collected
27 - Gobi´s boots
48 - Click Clock Clou
5c - Beta Game Over
60 - BETA-WORLD!
62 - Beta-Race!
68 - BETA-Sky
69 – OPEN (Beta) 6a - Beta(?)-Ghost
6c – Intro (This value doesn´t provide anything beta - but where is a little joke in the opening... OH MY GOD! HE HAS A FIDDLE! AND HE WILL USE IT!)
70 – *burps*-Soundtrack
78 – Tada!
7b- ?-Jingle 1
7c - ?-Jingle 2
7d - ?-Jingle 3
7e – reminds me somehow of Donkey Kong 64?
88 – secret
90 - Beta Game Over #2
8f - Beta-?-Track
91 – Beta falling
92 – Power!
98 – Beta-Bonus
99 - Mumbo´s Mega Tecno Party
a3 – Dramatic #1
a7 - Dramatic #2
a9 – Flute
ab - Continue?

The copyright for the soundmodification goes to IceMario.
However, Mumbo´s Raindance and Advent seem to be his only discoveries, the rest was mine.

The copyright for "have all secret eggs etc. goes to IceMario.

The copyright for the moonjump-code goes to slab.