Specifically, the 2012 archive.
It looks like you wrote 2 chapters in the tale of the Magical Plot Protectors (the archive seems to have done something funny to the formatting, so I've tried to correct it quickly).
First up:
Well, I've always been a fan of the Magical Girl genre, so...
Magical Plot Protector Agents Anne and Emma~
Anne was sleeping in her and her partner's shared room at the Protector's Garden, an interdimensional fortress that served as the hub of the Organisation, run by the Flower Princesses. She rolled over and had just gotten comfortable when...
"DI-IIIIIIIIIING!" squeaked out the small, furry animal sitting on the desk.
Anne moaned and turned to face it, when it spoke in an annoyingly high-pitched voice. "Protectors! There's a disturbance in Magical Girl Lyrical Nanoha! A Sue-wraith's possessed Momoko Takamachi and made her a magic-phobic abusive mother!"
Emma frowned. "Oh, for crying out loud. Anne, get out of bed," Anne growled and stood up. "You really should be nicer to CAD. Without him, we wouldn't be able to find out where the Stus were, or teleport, or anything!"
"Yeah, thanks for the exposition, Emms. I just wish that the Princesses had thought to make them a little less annoying. How'd you even figure out it's name, anyways?"
"CAD--Canonical Assistance Doodad. Where're the transformation thingies?" asked Emma. Anne grabbed a pair of small, black discs, each with a green cactus engraved on the front, and tossed one of them to Emma. The two girls said in unison, "Magical Guardians, Canon Protection Powers, Set Up!" In a flash of light, the two were dressed in black, frilly dresses. The black discs were now on chokers, and the two girls looked, well, like stereotypical Mahou Shoujo whose outfits had been dipped in black paint. The large gun and sword that Anne and Emma (respectively) were holding looked somewhat less stereotypical. Emma grinned. "OK, CAD! Open the portal!"
"Why do you have to be so cheerful about this?" muttered Anne.
CAD started to glow brightly, and within moments the glow had expanded into a bright-blue circle, with a slightly darker spot in the middle where the animal floated. Anne and Emma held their weapons carefully, and walked into the fic.
And secondly:
The two Magical Girls hid behind a couch while Emma recorded charges. "OK, we're ready to go! CAD, set up the Wraith Extraction Spell!" she chirped.
CAD nodded in assent, and opnede its mouth, reciting at high speed:
"MynameisTakamachiNanohaIwassupposedtobeanordinarythirdgraderbutasmallincidenthappened--"
As CAD recited the opening narration of the anime, glowing words began to flow out of his mouth. They quickly formed a net around the two canons, though Nanoha's was considerably more comfortable-looking than Momoko's bonds.
The two girls jumped up and yelled, "Sue-wraith! For the crimes of cruelty against the English language, messing up the relationships between Canon Characters, and almost replacing Momoko Takamachi, in the name of the Protectors, we will exorcise you!"
They struck poses in front the two canons. Momoko had just enough time to look confused before the canon recitation forced the Wraith out of her. "i dont get it shouldnt I be mahou shoujo themed t--" \*BANG!\*
Anne blew the smoke away from her gun. "I don't get why they think that we'll let them monologue--we don't really care why they're doing this." Emma shrugged as Momoko and Nanoha woke up.
"Ugh--what happened?" asked Momoko.
Emma looked at CAD. "Would you mind?" The small animal nodded and floated over to the two canons. Its eyes glowed for a moment, before flashing brightly.
"All done!" it squeaked.
Anne sighed. "Fi-nally. That took entirely too long. Just open the portal." CAD looked less than happy about her appreciation of it, but quickly opened the portal again. As they stepped back into their room, Emma turned back to the still-floating animal.
"Aren't you going to come down?" she asked. CAD seemed to give the impression of a smirk towards Anne, before squeaking:
"DI-IIIIIIIIIIIIIING! Protectors! There's a disturbance in Puella Magi Madoka Magica! A Gary Stu is trying to set himself up as a love interest for Mami!"
Anne groaned and buried her face in her pillow.
We also have what is possibly the only example of PPC AU Crossover fic, with this little piece that references both the Magical Plot Protectors and the TCDA:
"Princesses being the Big Goods is a well-established Magical Girl Trope!" yelled Anne, dodging the gunshots from the TCDA. "Just look at Pretty Cure!"
"Likely story!" called an Agent. "I've seen way too many Princess!Sues to believe something as fake as that!"
There may well have been other stuff too, but this is what I could find easily.
- Irish