Dobutsu no Mori
April 14, 2001
In Dobutsu no Mori and its revisions (Dobutsu no Mori+, Animal Crossing and Dobutsu no Mori e+), the complete Famicom/NES game Golf is featured as a playable game. It's obtained in various random ways, such as Tom Nook's Monthly Raffle, Crazy Redd's, as present from a neighbor, treasure hunts, birthday presents, etc.
See here for other NES games included in the game.
Copyrights for both series are held by Nintendo.