April Fools' Day: April of 2013 had the princesses swap their roles and turn the blog into Ask Gamer Molly + Lusty Luna, complete with a video. Judging from how badly they are acting it seems to be an in-universe gag.
Art Shift: The blog is usually drawn in a simplistic, sketched style with only a handful of colors for the different characters (usually a couple of shades per character), but occasionally there will be high-quality, full-color installments marking special occasions.
Ascended Extra: Gamer Luna has been steadily going from occasional cameos to being a recurring character who shows up frequently to take her sister's place in answering questions and to deliver a regular dose of adorkable-ness. Her name is even in the title now!
She even got her own blog, "Ask Gaming Princess Luna" following the termination of APM.
Derpy Hooves has been appearing as Luna's gamer friend fairly often as well.
The very next post showed a giant Molestia confronting a Kaiju attacking Equestria.
Another post showed a giant Molestia (sporting a particularly unnerving Slasher Smile) looming over a huge wall as an homage to Attack on Titan.
Attractive Bent-Gender: Molestia has a "63 Ray Gun" that turns its victims into the opposite gender for the day. All of the ponies generally look attractive after being hit, but of particular note are Applejack◊ (who becomes so attractive that his even his brother is impressed) and Trixie◊ (who, according to Molestia herself, could even give Big Mac a run for his money).
Audio Adaptation: Most notably by MEMJ0123, endorsed by JJ himself. There have also been a few other unofficial examples.
In a more recent one Molestia returns with gifts for Luna with no motive or attempts of molesting. She just wanted to be nice to Luna... And then Derpy ruins the moments by attempting a flying group hug.
Bear Hug: Luna does this to Fennekin (complete with bugged-out eyes), her starter Pokemon from Pokemon X and Y during her Cuteness Proximity moment mentioned below.
Bigger Is Better in Bed: When Trixie gets hit with the r63 ray, Molestia says that "he" is on par with Big Mac in that area. Trixie is delighted to be better than Twilight at something, and Molly's immediate reaction is to want to take it for a test drive.
Black Comedy Rape: While Molly doesn't outright sexually assault the ponies (on-screen at least), she still sexually harasses and occasionally fondles them to her hearts content, much to the embarrassment of her victims. All of them are played for laughs.
Clingy Jealous Girl: Molestia towards Twilight in varying degrees. Sometimes borders on Yandere, since Molly's made it clear that if Twilight ever gets a boyfriend, things will get rather... nasty◊.
Reaches its creepy conclusion when it's revealed that the true reason that Molestia turned Twilight into an immortal Alicorn is so she can have Twilight all to herself. FOREVER.
Naturally, she's not at all happy about the possibility of Twi getting together with Flash Sentry. Luckily for Flash, Molly hasn't deemed it necessary to Murder the Hypotenuse just yet, and is content to keep him under surveillance◊.
The last in a series of punishments for Trixie has Twilight give her an exam with a one-hour time limit. The exam itself looks to be several hundred pages long, and consists mostly of bizarre sexual questions.
The exam mentioned previously didn't quite turn out the way Molly wanted, so she thought up a new punishment for both Twilight and Trixie. It involves marple syrup◊.
Cosplay Otaku Girl: Molestia's not opposed to getting dressed up if the occasion calls for it, and she even puts on cosplay shows once in a while.
She even gets Luna involved, whether she wants to or not.
Dating Catwoman: Molestia admits that she has a thing for bad guys, and that she's been in relationships with Discord and King Sombra in the past. She was dumped in both cases.
Deconstruction Fic: Molest!, which shows what really happens when someone who has sex with everything that moves and even things that don't. However, it does go ahead and give it some Reconstruction as well.
Deep-Immersion Gaming: This is standard procedure for whenever we get a good look at Luna playing video games.
Depending on the Writer: Some of the posts has Molestia being truely affable and considerate to ponies' feelings despite making really inappropriate sexual advances while some others has her acting somewhat sociopathic and very self-centred to a point of not giving a damn about others.
Disproportionate Retribution: Molestia often deals this out to those unfortunate enough to incur her anger, even for perceived slights. In one instance, she claims to have thrown Applejack in the dungeon because she thought AJ was winking at her Twilight during the ceremony honoring the Mane Six for defeating Discord.
Dream Walker: Luna's been giving us details on her various dream walks ever since the power was revealed.
Drinking Contest: Between Molestia and Luna for New Year's 2014; neither remembers who won.
Erotic Eating: The blog's icon depicts molly suggestively eating a popsicle (during Christmas, the popsicle changes to a candy cane). In the blog itself, one of Molly's most notable uses of this trope involves a tootsie pop◊.
Molly's also fond of pouring various kinds of syrups on herself and making others lick it off.
Getting Crap Past the Radar: Even though the blog is suggestive as hell, it isn't outright explicit. But there has been two instances in which the word 'fuck' appears; Molestia says it when giving wellness wishes to a fellow ask-blogger named Flutterfuckershy, and Luna blurts it aloud when she thinks it would be censored. (It wasn't.)
Although Molestia did indeed get away with saying 'fuck' in it's literal noun form, the catch being that she said it in Swedish.◊ The bottom panel translates out to "Gah! I’m so horny! I need a good fuck right now! GUARDS!?"
Gratuitous Foreign Language: A couple of posts have had Molestia speaking in languages other than English; she's been shown speaking French◊, Swedish◊, and German◊. The latter being a bit less 'gratuitous', since she was attending Galacon, a brony convention held in Ludwigsberg, Germany and was addressing Canni, the con's mascot pony.
Happily Married: Cadence and Shining Armor. A bit too much as Luna keeps walking in on them.
This post◊ shows Twilight reading a diary entry that starts off describing Molly and Luna going at it, but switches to lyrics from a certain sitcom just before it would've violated the blog's content rating limit.
Jerk with a Heart of Gold: Princess Molestia is a dirty, shameless pervert who molests, teases, and gropes other ponies almost daily. But for the most part, she's very affable and despite her obvious kinks, fetishes, and her occasional sociopathic, narcissistic, selfish tendencies, she doesn't seem to intend to insult nor harm other ponies who don't want to go with her advances. Plus, she truly cares for her little sister and friends and tends to be considerate of their safety. For the most part.
Kinky Spanking: Molestia and Twilight decide that Trixie still needs to be punished for the Magic Duel, so they tie her up to Twilight's bed like a chariot, and drives Twilight around, who is whipping her to make her go faster. They make a background appearance in the next comic, and Trixie is starting to like it! A later strip has Trixie insist on being spanked with a paddle.
Mommy Issues: Molestia seems to have these, surprisingly enough, as the mere thought of having to meet her mother makes her extremely scared and vulnerable. Though considering her mother is the kindly Lauren Fausticorn, it's a mystery as to what these issues may be.
It's implied that Molestia is desperate to avoid having to discuss her sex life.
Later on down the line, we start to get a look at why Molly's mother is such a tender subject: Turns out that the last time they had seen each other was just after Nightmare Moon had been sealed. While Fausticorn understood that Celestia didn't have a lot of options at the time, she still felt that Celestia could have prevented Luna's corruption entirely if she had been a better sister, and left after making Celestia promise to behave herself from then on. Celly's subsequent descent into debauchery as Molestia is thus a major source of self-shame, as she believes that she's long since broken her promise.
Mood Whiplash: As per the previous trope, whenever the subject of Luna's and Molestia's mother comes up, the tone suddenly becomes much more somber.
Late December 2012 comics had the joke of Derpy living in the castle's Christmas tree. After the holidays are over and the tree is taken down, Derpy reveals she had been kicked out from her home since December and without the tree, she is now homeless. This part isn't played for laughs.
Nerdgasm: Luna tends to have these whenever really awesome game announcements are made. Sometimes, cleanup is required.
Disappeared Dad: Unlike their mother in the next trope, Luna and Molestia have no idea◊ who or where their father is.
Missing Mom: Ironically, we only learn this upon actually meeting the royal sisters' mother. Heartbreakingly Justified, as their mother can only rarely travel to their dimension, and then only for a few hours at a time.
Schmuck Bait: In the final post (NSFW site) of Ask Princess Molestia, a questioner asks "so molly if i gave you a random button, would you push it?" Molestia is Genre Savvy enough to ponder the consequences seriously, when Luna rushes in and repeatedly mashes the button. Ask Gaming Princess Luna later confirmed that the button was the In-Universe cause for the Molestia blog being deleted and Molestia being trapped in space for subjective eons, which transformed her (back?) into canon Celestia.
Screw Yourself: There's been several times where Molestia has engaged in an orgy with multiple clones of herself, one of which◊ lasted for at least several days.
She Is Not My Girlfriend: There's a mild subtext between Luna and Derpy, mostly by accident on Luna's part (for example, singing the "Heeeey sexy lady!" part of "Gangnam Style" just as Derpy enters the room). Luna denies it, but Derpy doesn't seem to mind. It's not entirely clear how much of it Derpy understands, though.
Shipper on Deck: Molestia now seems to be actively hoping Luna and Derpy will get together.
Shoot the Messenger: Jealous that Luna is getting more fan mail than she is, Molestia kidnaps the mailman.
She does ban cake◊ because of how fattening it is, after Twilight◊ starts putting on weight.
Luna doesn't seem to worry about it as much, but she seems to be in better shape anyway. After a long junk food fueled gaming session of Grand Theft Auto V, Luna is more worried about being a slob◊ rather then putting on any extra pounds.