So... is Alice in Cyberland finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: December 16, 1996
Manga finished: January 01, 2002
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Synopsis
In the not-so-distant future, a digital realm called Cyberland exists within computer networks.
When a group of criminals known as Cybernackists begin causing trouble in this virtual world, a mysterious figure named Lucia recruits four young girls.
Alice, Miss Catnick, Leina, and Julie are chosen to become a specialized fighting force.
They must use their unique abilities to defend Cyberland and stop the Cybernackists from wreaking havoc on the digital world.