Dobutsu no Mori+
December 14, 2001
In Dobutsu no Mori+ and its revisions (Animal Crossing and Dobutsu no Mori e+), the complete Famicom/NES game Baseball is featured in the game, though it's only obtainable on "the Island", accessed by connecting the Game Boy Advance to the GameCube.
See here for other NES games included in the game.
Copyrights for both series are held by Nintendo.