Gaming
 

Pink Mystery Egg

From the Banjo-Kazooie Wiki, the largest Banjo-Kazooie info resource.

The Pink Mystery Egg was one six secret eggs found in Banjo-Kazooie. When you typed in a cheat code, the Sharkfood Island would be raised from the ground for you to enter. Then, after a long jumping segment, the pink egg is yours. Mumbo Jumbo would show you the pink egg if you collected all 100 Jiggies before defeating Grunty.

In Banjo-Tooie if the egg is brought to Heggy she'll hatch it and the secret move Breegull Bash will be unlocked. In Banjo-Tooie (XLBA), the egg will unlock a new gamer theme.