Game Boy Advance

The Game Boy Advance (GBA) is a handheld video game console made by Nintendo and released in 2001. While no Animal Crossing games were released for the Game Boy Advance,, , and feature GBA connectivity via the Nintendo GameCube–Game Boy Advance link cable. Additionally, several series of e-Reader cards for the aforementioned games were released for the GBA's e-Reader accessory.

The GBA sold a total of 81.51 million units worldwide. It was succeeded by the Nintendo DS in 2004.

Advance Play
In and, when interacting with an NES game item while a Game Boy Advance is connected to the Nintendo GameCube, the Advance Play option appears. Advance Play downloads the NES game's data to the GBA and allows it to be played there. Afterward, the GBA can be disconnected to the GameCube; it can be reconnected to transfer data back to the GameCube to save progress.

,, , and the unobtainable do not support Advance Play as they are too large to be stored in the GBA's RAM.

Animal Island
In and, Animal Island can only be accessed while a Game Boy Advance is connected to the Nintendo GameCube. When on the island, when the player asks Kapp'n to return to the mainland, he gives them the option to save the island to the GBA. If the player does this, the minigame appears on the GBA. In the minigame, the player can interact with the islander, helping them catch fish, eat fruits or coconuts left on the ground, dig up buried items, chop down trees, or catch flying presents. The next time the player visits the island, any changes made to the island in the minigame are uploaded to the GameCube.

In, the Animal Island minigame is removed, as the island no longer requires a GBA connection to visit and is instead unlocked after paying off a loan.

Design maker
In, , and , the player can create and edit designs on the Game Boy Advance if one is connected to the Nintendo GameCube when speaking to Mabel at the Able Sisters.

Doubutsu no Mori e+: Doubutsu-tachi to Asobou!
In, the player can access one of three minigames, collectively known as Doubutsu no Mori e+: Doubutsu-tachi to Asobou!, from the wishing well while a is a collection of three Game Boy Advance minigames that can be accessed from the wishing well while a GBA is connected to the Nintendo GameCube. These minigames feature villagers from the player's town alongside the player, and if won, the player receives one of 18 exclusive furniture items.

e-Reader
The e-Reader is an accessory for the Game Boy Advance that can read special scannable cards, which transfer data to GBA. Multiple series of cards were released for, , and. In and, a GBA with an e-Reader can be connected to the GameCube for additional features.