Bee Banjo

Bee Banjo is a special, unique transformation that appears in both Banjo-Kazooie and Banjo-Tooie.

Banjo-Kazooie
In Banjo-Kazooie, the Bumble Bee (or Bee as it is called in the game) is the transformation of Click Clock Wood, as well as the most expensive one in the game (costing a whopping 25 Mumbo Tokens to perform). Its value lies in its ability to fly by pressing in mid-jump, without requiring the use of Red Feathers or a Flight Pad.

When flying, the player can press to fly higher and hold  to fly faster. When the Bee enters water though, it will immediately fly automatically. The Bee is also immune to the thicket area surrounding Mumbo's Skull and to the Snarebears; however, the transformation is only usable in Spring (as Mumbo has various excuses in the other seasons). Interestingly enough, cheat codes have proven that Bee Banjo can walk on the quicksand of Gobi's Valley and the murky waters of Bubblegloop Swamp, but not on Freezeezy Peak's ice water.

Banjo-Tooie
In Banjo-Tooie, the Bee is the native transformation of Cloud Cuckooland. In addition to its flight abilities introduced in Banjo-Kazooie, it can now fire stingers at enemies using (with  to aim). When flying, you can fire at a much faster rate than when standing. Stingers do similar damage to Blue Eggs and are the only way to destroy the Eyeballus Jiggium Plants. The Bee will also leave an animation trail of blue sparks when flying faster.

The Bee is the only way to reach and enter The Zubba's Nest and complete the mini-game to earn a Jiggy (Banjo and Kazooie are unable to enter because only bees are allowed inside).

Trivia

 * Despite the four parts of Click Clock Wood being one world, Bee Banjo can only be used in Spring.