Spell

Spells are several gameplay-altering abilities Mumbo Jumbo and Humba Wumba can perform on Banjo and Kazooie. In Banjo-Kazooie, Mumbo will turn Banjo into a different form in exchange for 5 Mumbo Tokens. Every animal transformation is only available in a specific level, though the player can leave the level with the transformation still active. This feature is used for some puzzles and platforming challeges in Gruntilda's Lair. In Banjo-Tooie, the player can give Mumbo a Glowbo in every level to briefly play as him. He can perform a specific spell by interacting with a Mumbo Pad in the level.

Banjo-Kazooie

 * Very rarely, he mistakenly turns Banjo into a washing machine, before going on to turn him into the correct transformation. Also he mentions he would turn Banjo into a T-Rex but changes his mind, saying that the transformation is meant for the next game.