Revealing mistake: In the presentation for the fellow Ultimate Students, the screen scrolls showing several magazines Junko, the Ultimate Fashionista, has appeared in. In the background, one of the magazines has obvious jibberish filler text in it, since it goes, I quote: "argrwgawrg agreg agregraegraaerg asg."
Other mistake: In Chapter 3, the kids find the computer with Alter Ego. The text says the computer screen glows "a pale green", but the artwork shows a unequivocally blue hue.
