Bee Banjo

Banjo-Kazooie
In Banjo-Kazooie, the Bumble Bee (or Bee as it's 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. When flying, you can press to fly higher and hold  to fly faster. By jumping into water, it will fly automatically. It's also immune to the thicket area surrounding Mumbo's skull and to the Snarebears, but it's 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 quicksand and Bubblegloop Swamp's murky water, but not 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. It will also release blue sparks when flying faster. The Bee is the only way to reach and enter Zubba's Hive and complete the mini game for a Jiggy (Banjo and Kazooie can't enter because only bees are allowed).