Banjo-Kazooie Wiki

The Shack Pack is an ability which Banjo can learn from Jamjars on the lava side of Hailfire Peaks, and is executed by holding Z button (N64) and pressing C down button (N64). With it, Banjo can safely submerge himself in hazardous liquids, such as scalding water, and fit into tight spaces normally only accessible by Clockwork Kazooie Eggs.

Jamjars' Rhyme[]

This one makes you safe
and small,
to fit through gaps in a
First hold Z button (N64) then press
C down button (N64),
protected in liquids you
will be!