What happens when you get all the Jiggies in Banjo-Tooie for N64?

In Banjo-Tooie, collecting all 100 Jiggies will unlock the Rusty Bucket's secret final form, the "Shovel Knight." The transformation of the Rusty Bucket grants Banjo and Kazooie the ability to tunnel quickly throughout the game world, making navigating certain levels substantially faster and more convenient.