Boltoid, along with Nutta and Washup, is part of a trio of large machinery parts (bolt, nut, and washer) that lies scattered around Grunty Industries. While it appears harmless when inert, as with most objects just laying around the factory, it will spring up suddenly to attack any nearby bear and bird intruders. However, Boltoids are relatively weak and can be easily dispatched. Weldar has the ability to spit out Boltoids, Nuttas, and Washups during the boss battle. When unleashed, these parts run straight at Banjo and Kazooie.