Banjo Kazooie Mysteries
STOP 'N SWOP
Ahhh... we all know about this one. Get the eggs and a screen will appear saying "Stop N Swop"  With the 6 eggs and and Ice Key you got by using debug codes. Do they do anything? Not sure no one has found them out, but i believe its a dropped project.

Solved? No
but alot of new theories are coming out all the time, which are way off

Beauty Machine doors
Doors you cant open, eh? There outside the beauty machine but cannot be opened... what do those doors have behind them?
Solved? YES
Behind them is nothing but black sadly, but hey if you moonjump behind it it becomes FUN!