Washer Banjo

Washer Banjo is one of the more humorous transformations found in Banjo-Kazooie and Banjo-Tooie.

Banjo-Kazooie
In Banjo-Kazooie, the transformation is simply used as a joke. During one of Mumbo Jumbo's transformation spells, he will accidentally turn Banjo and Kazooie into a washing machine, then jokingly request that you wash his underwear. But after a note of caution for you to remain still, he will immediately turn you into the proper transformation.

By completing all of Bottles' Bonus Challenges, you can unlock a cheat that will turn you into the washing machine. This version of the washing machine has access to all of Banjo and Kazooie's moves. While Mumbo is against the idea and claims he won't transform you while being a washing machine, he will still transform you (for free if you haven't paid yet)! but he'll turn you back into the washing machine.

Banjo-Tooie
In Banjo-Tooie, the Washer is the native transformation of Grunty Industries. Unlike the previous one in Banjo-Kazooie, this one has wheels, the largest energy bar in the game (up to eleven honeycombs), and doesn't look at all unhappy. The Washer can attack by firing old smelly underpants by pressing (aim with ), and it can help the Skivvy rabbits by washing their overalls. Washer Banjo can also attack enemies by firing white underpants, which do the same damage as a Blue Egg but do not fire in a straight direction. The Washer's immense weight also allows it to press down on a certain switch in the level (which has an electromagnet guarding it that Mumbo must disable first), but also impairs the duo's jumping ability. It is also worth noting that the transformation always has two more honeycombs than Banjo and Kazooie can have.

Trivia

 * There is also a Washing Machine available as a prize at the end of Grunty's Furnace Fun, but it has no resemblance to Washer Banjo.
 * In Banjo-Kazooie: Nuts & Bolts, there are washing machines in Banjoland that look similar to Washer Banjo.