Humba Wumba

Humba Wumba is a shaman who made her debut in the Banjo-Kazooie series in Banjo-Tooie. She introduced herself as Mumbo Jumbo's rival, taking up his previous role in Banjo-Kazooie as the shaman who transformed Banjo (and Kazooie eventually), while Mumbo performed powerful spells around the world so Banjo and Kazooie could complete puzzles.

Beta
In a beta screenshot for Banjo-Tooie in Nintendo Power Volume 134, Humba Wumba is seen wearing a pink dress. The Mumbo Token symbol can be seen in the bottom right side of the screenshot implying that Humba Wumba was at one time going to accept Mumbo Tokens instead of Glowbos.

Banjo-Tooie
Humba Wumba would wait in her wigwam in Tooie, until the duo needed her magic. Humba's magic required a Glowbo to work, something Banjo and Kazooie would find around the world, and bring to Humba Wumba. They would then throw it into a pool of water in the middle of the wigwam, and jump in to transform. Once the spell was completed, a Glowbo wasn't required.

These are her transformation spells:
 * Isle o' Hags - Dragon Kazooie, Kazooie is now a dragon and she can do a flamethrower attack which causes enemies to run away. This transformation requires a Mega-Glowbo instead of a regular Glowbo. You also get infinite Fire Eggs.
 * Mayahem Temple - Stony (a little stone statue), which can shoulder-barge.
 * Glitter Gulch Mine - Dynamite Detonator, which explodes, causing a slight loss of health.
 * Witchyworld - Van, which is invincible. It can honk a horn which opens a special door.
 * Jolly Roger's Lagoon - Submarine, which can shoot missiles and release sonar blasts.
 * Terrydactyland - Baby/Daddy T-rex. The Baby T-Rex is much smaller than and is not as feared as Daddy T-rex. The transformation depends on the size of Humba's wigwam. They both roar.
 * Grunty Industries - Washing machine. It appeared as a joke in Banjo-Kazooie. It can shoot underwear, and wash clothes for rewards. It's also resistant to lava.
 * Hailfire Peaks - Snowball. It starts off as a small snowball with low health, gaining health by rolling in the snow and growing bigger and heavier. It can then launch itself to hurt enemies and solve puzzles. At the maximum snowball size, it cannot go through many small doors including the door to Wumba's Wigwam. Use the fire next to the wigwam to shrink the size of the snowball. If you go on the Fire side, You wil rapidly lose health and explode.
 * Cloud Cuckooland - Bee. Returning from Banjo-Kazooie, it flies enormous heights, and can now also shoot stingers.

Banjo-Kazooie: Nuts & Bolts
Humba Wumba has only been announced to be in Banjo-Kazooie: Nuts & Bolts. Her new role is that of a Blueprint Merchant, selling pre-made vehicle blueprints to Banjo.