Created by {{Tropers/Arcadiarika}}, ''A Random MST'' is ExactlyWhatItSaysOnTheTin: {{MST}}ing horrible fanfics/stories. However, while it does have one consistent character throughout the series so far--hapless Professor Kristopher Smith of ''The Arcadian Legends''--sometimes, the frameworks for the [=MSTs=] take place in different times and different places.

So far, the following [=MSTs=] have been made for this series:

* Works penned by Arcadiarika:
** ''[[ Eevee TF TG]]''
** ''[[ Pokemon Attack of Mewtwo]]''
* Works penned by Lati-Rika (same person on the same site of deviantART, different handle)
** ''[[ boy to girl to fox TF TG]]''
** ''[[ The Horribly Bloody Death of Kairi]]''
** ''[[ Pokemon Attack of Mewtwo 2: Attack of Team Rocket]]''
** ''[[ TWA International Bash]]''

!!''A Random MST'' provides examples for the following tropes:

* AuthorAvatar: For the 2095 Arcadia timeline, Shaymin Hat Girl. For the ''{{RolePlay/We Are Our Avatars}}'' timeline, Rika appears very briefly.
* AuthorTract: ''The Horribly Bloody Death of Kairi'' is a commentary on why DieForOurShip fics simply don't work, and ''Pokemon attack of mewtwo 2: attack of team rocket'', especially with the ending with its author's RageQuit message, is a commentary on how [=MSTers=] poke fun at fanfics. Mileage varies on whether or not any one of those are successful, however.
** CompletelyMissingThePoint: it was revealed, however, dark-lemur, the one who wrote the ''Fanfic/PokemonAttackOfMewtwo'' series, stated that the final chapter of the sequel was actually a response to those who gave him messages that verged on death threats instead of the MST itself. [[NiceJobBreakingItHero Whoops.]]
* {{Crossover}}: The first two [=MSTs=] have [[Series/PowerRangersLightspeedRescue Carter Grayson]] and AuthorAvatar Shaymin Hat Girl. The other three [=MSTs=] have [[RolePlay/WeAreOurAvatars Catherine Grayson]]. The fifth MST takes it further with [[Tropers/SapphireFlame Sapph]], other AuthorAvatar character!Rika, and [[Anime/TengenToppaGurrenLagann Kamina himself]].
* {{MST}}: Duh.
* MythologyGag: Intentional or not, even with the wrong Carter, the characters MSTing a Charles Roberts fanfic nearly echo when a few of the Avatars did the same thing. Minus the force-feeding with a computer bit.
* SanitySlippage: Especially during really bad fanfics.
* ScrewThisImOuttaHere: The edit to the fanfic ''{{Fanfic/The Horribly Bloody Death Of Kairi}}'' had this disclaimer, stating that she wouldn't touch the fanfic again and told everyone else to MST it instead.
* ScriptFic: {{Averted}}. This is one of the few [=MSTs=] where the riffers are written in prose.
* SelfDeprecation[=/=]TakeThat: Jabs at arcadiarika herself are made OnceAnEpisode.
* ShoutOut: References to Website/ThatGuyWithTheGlasses reviewers ("[[WebVideo/AtopTheFourthWall Our heroes, ladies and gentlemen]]" and "[[WebVideo/TheNostalgiaCritic Of COURSE!]]" in response to taking over the world) are also made OnceAnEpisode. Also, see ActorAllusion above.
** From the ''TWA International Bash'' MST, [[Film/TheRoom "Skunk is a chicken! CHEEP CHEEP CHEEP CHEEP!" and "Oh, hi, semicolon!"]]
** Her recent edit to ''The Horribly Bloody Death of Kairi'' says that she wouldn't touch the fanfic [[WesternAnimation/HowTheGrinchStoleChristmas with a 39-and-a-half-foot-pole]].