Ghost Crates

In Banjo-Kazooie: Nuts and Bolts, there are multiple crates full of vehicle parts scattered all around Showdown Town. Some of them have small ghosts of dead pigs sitting on top of the crates. If talked to, they will talk about awaiting for the "fabled sirens call". To get rid of the ghosts, you must first defeat Gruntilda in the final battle, where you will obtain a siren. Once obtained, the siren may dispel the ghosts from the crates.