According to the e-Reader cards for Mario Bros. and Ice Climber, Tom Nook gave these away for free as a "loyalty gift" for customers of his various stores.
There is a NES console that has no games included with it. When attempting to play it, a message is displayed saying you do not have any software to play.
It was recently discovered that the console actually attempts to load NES ROM save files from the Memory Card. These games could then be selected from a list to play. It is speculated that Nintendo planned on distributing these games through some media as additional content.
Some people will do anything to get you into their tents, or stores. Well I can tell you I will not stoop so low. I did however find this classic NES game on a storeroom shelf. Would you like it? Let's just call it a "loyalty gift" shall we?
Animal Crossing - All NES Games (Forbidden Four)-2
Famicoms in the Japanese version (from left to right: Clu-Clu Land; Balloon Fight; Donkey Kong; Donkey Kong Jr. Math; Pinball; Tennis; Golf; Famicom Disk System).
Only seven Famicom games can be obtained in Animal Forest for Nintendo 64. These games are given a color code as well:
Orange: Clu-Clu Land
Grey: Balloon Fight
Red: Donkey Kong
Blue: Donkey Kong Jr.
The original Japanese release of Animal Forest+ for GameCube lacks Soccer and Excitebike, and instead features the early Famicom versions of Gomoku Narabe and Mahjong.
Depending on the version of the game, some NES games are obtained through different means.
Clu Clu Land D, Soccer, Donkey Kong 3, Donkey Kong Jr. and Punch-Out!! were initially unavailable in-game, however Nintendo of America and Nintendo of Europe later released codes that could be used in the game to unlock them, though Punch-Out!! was deciphered by fans.
Super Mario Bros. and The Legend of Zelda cannot be played through normal means, although Super Mario Bros. was given away between 2001 and 2002 by Famitsu for Animal Forest+.
Some NES games were re-released in Classic NES Series for GBA.