Of the many different forms of convenient plot progress as well as plot device used to resolve sticky situations, the idea of amnesia sure is very plausible and no doubt the most commonly (popularly) deployed. Heck, even Hayate no Gotoku was quick enough to point this out, in the episode where Hayate supposedly lost his memory to avoid awkward situations. This trend is most notable in year 2008’s productions, starting with Code Geass: R2, in which the Emperor’s Geass rewrote (reraito shite!!!) Lelouch’s memory, followed by more recently, we have To Aru Majutsu no Index and Tales of the Abyss joining the rank of the boggled mind, with Index and Luke both having limited amount of memory — talk about a great soft-reset button: the blank space in the mind can be slowly filled up by lol-plot twist and the likes of it… I guess. Oops, almost forgot (talk about a good way to start a new sentence, eh? Oh the irony!) about Vampire Knight Guilty and the revelation of Yuuki’s true identity, thanks to once again, yet another amnesia incident as a plot device. Well, whatever it is, amnesia as a plot device is here to stay.
But really, I doubt we ever had a year in which we have so many series with said plot device. And there I was saying in my 2008 Summary post about how it was year in which the productions were not as memorable as those of year 2006 and 2007.[/random rant]