Famitsu: 38/40

For comparison:

Super Mario Odyssey: 39/40
Astrobot: 36/40
Kirby and the Forgotten Land: 36/40
Super Mario Bros. Wonder: 36/40

source:

https://nintendoeverything.com/famitsu-review-scores-july-16-2025-first-score-for-donkey-kong-bananza/