Banjo-Kazooie Wiki

Grenade Eggs, called Rear Eggs in Super Smash Bros. Ultimate, are explosive green eggs which Kazooie can learn to use from Jamjars within the Pine Grove in Banjo-Tooie. Only 25 grenade eggs can be carried (unless the "EGGS" cheat is activated, which allows 50 to become the maximum) and Kazooie must pause in between each firing (as opposed to Blue Eggs, which allow three to be fired in quick succession), but they are one of the most powerful types of eggs (tied only by Clockwork Kazooie Eggs) and arguably the most useful in the game.

Aside from dealing heavy damage to enemies and bosses, not to mention the splash damage which can kill bad guys without a direct hit, Grenade Eggs are useful for destroying rocks and breakable walls, as well as harder enemies like Sput Sput and Fruity. Be careful when using Grenade Eggs as the resulting explosion can damage Banjo and Kazooie if used at close range and can send them flying backwards or even sometimes right off the ledge of a nearby cliff.

Jamjars' Rhyme[]

For blasting things
these eggs were made,
don't stand close when
you fire a grenade!