Donkey Kong 64 - Banjo-Kongzooie is a fan-made crossover concept or ROM hack combining elements of Donkey Kong 64 and Banjo-Kazooie. It’s not an official release but rather a testament to the creativity of the fan community.  The exact gameplay and features would depend entirely on the developers of the ROM hack. It likely leverages assets and ideas from both of the source games, resulting in a unique experience.

Donkey Kong 64 - Banjo-Kongzooie

DK64 Ok Edition