From Nookipedia, the Animal Crossing wiki
Linking to pages located on another wiki is just as easy as linking to any page on our own. A list of all the sites available for interwiki linking is available on Special:Interwiki. If you'd like to request a site to be added to the list, just leave a message on the talk page of any Director.
The best way to learn how to use interwiki links is just to look at a few examples.
Seem easy? That's because it is! We didn't even need to put more than one example to explain it. It's that simple!
Why use Interwiki Links?
You may be wondering why interwiki links are recommended over regular links. Both will work, but interwiki links allow us to update all links from a certain site very quickly. This comes in handy when a site changes its domain or URL scheme. Because of this, the Nookipedia team asks that all users try to use interwiki links whenever possible.