Twitter user im salt was the one to point this out when posting a clip of this easter egg. Specifically, he posted a clip comparing Kazooie's Rapid Jab move to that of the theme from Banjo-Kazooie.

The dynamic duo Banjo & Kazooie are the latest challenger to enter the ring in Super Smash Bros Ultimate, and like every DLC character before, they’re quite a bit different from anyone else. Of course ...

Out of all the franchises in Xbox's extensive portfolio, Banjo-Kazooieis probably one of the most troubled ones. Banjo-Kazooie got its start on the Nintendo 64 in 1998, back when the series' developer ...

At the heart of the game is the unlikely partnership between Banjo, a lovable bear, and Kazooie, a sassy bird who resides in his backpack. This dynamic duo not only provides comic relief but also ...