An unused villager, fan-dubbed Blazel, can be found in the game's code. The villager's name is a series of glitched characters, and has characteristics similar to Bliss and Hazel. Talking to the villager a second time changes its name to Jambette, possibly due to memory errors. An odd quirk is that it's loaded in the memory with other non-villager NPCS.

Animal Crossing is only one of four versions of the same game. Three of which were only released in Japan. The first version was for the Nintendo 64, entitled "Dobutsu no Mori", which translates to "Animal Forest". The second version, "Dobutsu no Mori +", was an enhanced remake of the original game, released on the Gamecube. This was the version that would be localized as Animal Crossing in the United States. The final version, "Dobutsu no Mori e+", was a second enhanced remake released on the Gamecube. There was also an unreleased sequel to "Animal Crossing", tentatively entitled "Animal Crossing 2".

The NES games Balloon Fight, Baseball, Clu Clu Land, Clu Clu Land D, Donkey Kong, Donkey Kong 3, Donkey Kong Jr., Donkey Kong Jr. Math, Excitebike, Golf, Ice Climber, The Legend of Zelda, Mario Bros., Pinball, [urli=game/punchout/]Punch-Out!![/urli], Soccer, Super Mario Bros., Tennis, and Wario's Woods can be played in the game. They can be acquired through Game Boy Advance connectivity, e-Reader, and secret codes to Tom Nook. However some can only be obtained with the use of a cheat device which can also unlock all of them at once.

If you you use an Action Replay, you can access the paper airplane item in your inventory. If you place the item on the ground, walk off screen, and come back, the paper airplane will duplicate itself. Pressing the A button while on top of the paper airplane will make it disappear visibly, but will still exist in the system's memory. Letting the airplane multiply too much can crash the game.