Character Derailment: Parodied and Lampshaded many times in "The Human Whose Name Is Written In This Fanfiction", also in "Light Yagami`s Adventures in Fandom Land"
Possession Sue: Misa becomes one in chapter 4 of THWNIWITFF. This is of course Lampshaded: "This whole tale may sound nearly identical to any L x OC story and that is because it is. Misa has been reduced to a sort of canon Mary Sue. She is beautiful, more intelligent that she looks, devoted to L, and of course perky."