The Mexican Spanish dub is basically a reunion from many regulars from the dub of Sailor Moon. Ivy, just like in Japan, is also Sailor Venus and Zack is Seiya Kou from the same show as well. Carmen Sandiego (Rocio Garcel) is Luna and The Chief (Genaro Vasquez) was both Gurio Umino and Tuxedo Mask's first voice.
The original Ivy and Zack would later appear together as Sheena and Lloyd in the English dub of Tales of Symphonia. (Both also appeared in Avatar: The Last Airbender, but in completely unrelated roles, and only once in the same episode, "Bato of the Water Tribe.")
In Chapter and Verse, the ACME Detective Agency's entire database, Chief AI and all, can supposedly fit on a single standard CD (which Zack bizarrely refers to has a floppy disk). Granted, it was one of Carmen's own pieces of tech that pulled it off, but still, she effectively stole The Other Wiki and put it on a CD.
Dinosaur Delirium has Carmen stealing bleeding edge research that she plans to use to turn genetic material from extinct dinosaurs into living dinosaurs. And it all fits on a few floppy disks.
Unintentional Period Piece: It's really, REALLY Nineties. Easy way to tell? The pre-9/11 World Trade Center is in the background during the opening.