From Nookipedia, the Animal Crossing wiki
The Nintendo 64, N64 for short, was a home video game console made by Nintendo, released in 1996 in the United States, Japan, and Europe. Dōbutsu no Mori was originally released only in Japan for the Nintendo 64 in 2001, but by that time the Nintendo GameCube was already out, so the game did not sell very well until being re-released as Dōbutsu no Mori + on the Nintendo GameCube. The system was named after its 64-bit central processing unit.
Playable Animal Crossing series games: