As someone who's been a fan of Donkey Kong since the SNES days, the final boss fight was so satisfying. It reminded me of the final battle of Sonic Lost World, taking a major villain who had fallen by the wayside over the course of the series and bringing him back to his former prominence.

While the final boss was tough, he never felt unfair. (Though it likely helped that I had Pauline's outfit that regenerated health while DK was in a Bananza mode)

My favourite little touch was the return of the ONK sound when a certain enemy was beaten.