since banjo came out, i go ahead and throw these out.
if you already have this specific master code for 1.2.0, you dont need to copy it twice.
(it for the new gamers that dont have the codes as it need for the codes to work)
source:
https://gamehacking.org/game/21067
[master code used for pointer setup and game checking]
54000000 005D20E0
580F0000 005D20C0
[Banjo-Kazooie]
20000000
[(L) mj]
C0450400 4E424B45
80000040
400C0000 00000000 0037B6BC
620C01F0 00000000 0000E043
20000000
20000000
[Infinite Lives]
C0450400 4E424B45
400C0000 00000000 003851AB
610C01F0 00000000 00000009
20000000
[Infinite Health]
C0450400 4E424B45
400C0000 00000000 003851A3
610C01F0 00000000 00000008
20000000
[Infinite Air]
C0450400 4E424B45
400C0000 00000000 003851AE
620C01F0 00000000 0000100E
20000000
[Infinite Mumbo Tokens]
C0450400 4E424B45
400C0000 00000000 003851C3
610C01F0 00000000 00000063
20000000
[Infinite Jiggy's]
C0450400 4E424B45
400C0000 00000000 003851FF
610C01F0 00000000 00000063
20000000
[Infinite Notes]
C0450400 4E424B45
400C0000 00000000 00385183
610C01F0 00000000 00000063
20000000
[Infinite Eggs]
C0450400 4E424B45
400C0000 00000000 00385187
610C01F0 00000000 00000063
20000000
[Infinite Red Feathers]
C0450400 4E424B45
400C0000 00000000 0038518F
610C01F0 00000000 00000032
20000000
[Infinite Golden Feathers]
C0450400 4E424B45
400C0000 00000000 00385193
610C01F0 00000000 0000000A
20000000
[Infinite Health With Red Honeycombs]
C0450400 4E424B45
400C0000 00000000 003851A7
610C01F0 00000000 00000010
20000000