Giant Blue Egg

The Giant Blue Egg is an item found in Banjo-Kazooie. It is located behind a Note Door that requires 828 notes to unlock in the very last room before the final fight with Gruntilda in Gruntilda's Lair. Collecting the egg will completely replenish Banjo and Kazooie's supply of Blue Eggs. It is not required for the final battle, but it is an immense help.