Yumbly

Yumblies are small red creatures found in Bubblegloop Swamp in Banjo-Kazooie. They are used in the mini-game, Eat More Yumblies or Grumblies than Mr. Vile, where Banjo (as a crocodile) must consume more Yumblies and/or Grumblies than Mr. Vile.

Trivia
It's unknown if Yumblies are known as Yumbly or Yumblie in singular form.