Beak Barge

The Beak Barge is a powerful but slow move that, as its name implies, allows Banjo to use Kazooie's beak to barge into objects and enemies.

Banjo-Kazooie
In Banjo-Kazooie, the Beak Barge is taught by Bottles in Spiral Mountain, being performed by crouching with, then pressing (or crouching with , then pressing  in the game's Xbox Live Arcade release).

Banjo-Tooie
In Banjo-Tooie, Banjo and Kazooie already start the game knowing the Beak Barge, but it can be remembered by Bottles' ghost in Spiral Mountain. It is performed the same way as it did previously.

Super Smash Bros. Ultimate
In Super Smash Bros. Ultimate, the Beak Barge is used as Banjo & Kazooie's down tilt move.

Trivia

 * A screenshot of a later Nintendo 64 build of Dream: Land of Giants shows the Beak Barge being performed.