Buffy the Vampire Slayer episode Doomed
January 18, 2000
In a scene in the 11th episode of season 4 of Buffy the Vampire Slayer, Riley is walking in the streets, trying to track a demon he previously met using an electronic handheld device. As Buffy bumps into him she asks "Is this really the time for Donkey Kong?" to which he replieas "What? Oh. It, ah, takes trace readings of creatures pheromones."
Fox and Mutant Enemy Productions, that produced Buffy the Vampire Slayer don't hold any right over Nintendo's Donkey Kong, but they only included a minor reference to the game.