This story is already a curiosity. In the '90s the editors wanted to move with their time and encouraged me to use modern things in my Duck stories, like CDs and (gulp!) computers.
Computers were pretty new at the time, and I remember one of my first computer plots was refused, with a commentary like: "Maybe our kids will understand this story, but we certainly don't appreciate".
Anyway, eventually everything fell in place and I did other stories that were accepted.
Like this one, where Magica DeSpell turns herself into a... floppy disc!
Who remembers floppy discs? They could contain no less than 1.4 Megabytes! Incredibly practical!
To get her out of Duckburg's central computer, the nephews make her the subject (or rather victim) of a video game, which was another thing parents did not appreciate at all at the time.
(In fact, I was convinced I never did stories with Magica, as I find the character much too one-dimensional, but lo, I did!)
Story code: H 95057
Pencils: Mau Heymans
Ink: Peter Collé
Date of first publication: June 2, 1995