This page explains in detail the interactions between the Animal Crossing series and the Clu Clu Land series.
Dobutsu no Mori[]
April 14, 2001
Clu Clu Land in Animal Crossing.
Animal Crossing
Clu Clu Land
In Dobutsu no Mori and its revisions (Dobutsu no Mori+, Animal Crossing and Dobutsu no Mori e+), the complete Famicom/NES game Clu Clu Land 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.
Dobutsu no Mori+[]
December 14, 2001
Clu Clu Land D in Animal Crossing.
Animal Crossing
Clu Clu Land
While Clu Clu Land returns as a base game obtainable at random locations, in Dobutsu no Mori+ and its revisions (Animal Crossing and Dobutsu no Mori e+), Clu Clu Land D is added, but it's normally unaccessable and was made available only through Nintendo's giveaways.
See here for other NES games included in the game.
License[]
Copyrights for both series are held by Nintendo.