Coldfire the Bat
Twinkling Balloon - Took part in the 2021 community collab.
Wallet After Summer Sale -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends.
A Tale For The Ages - Celebrated MLP's 35th Anniversary and FiM's 8th Anniversary
Condensed Milk - State-Approved Compensation
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Birthday Cake - Celebrated MLP's 7th birthday
Not a Llama - Happy April Fools Day!
Artist -

Floof batto
Oh look nothing new has been added to the Glimmer debate.
Blissey1
Silver Bit -
Sapphire -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends
Cool Crow - "Caw!" An awesome tagger
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Fine Arts - Two hundred uploads with a score of over a hundred (Safe/Suggestive)
Not a Llama - Happy April Fools Day!
Perfect Pony Plot Provider - Uploader of 10+ images with 350 upvotes or more (Questionable/Explicit)
Magnificent Metadata Maniac - #1 Assistant
Squirrel - "Good idea! If she eats all the prisoners, then that frees up a ton of the taxpayers money!"

@Background Pony #3E82  
>implying talking down =/= being beaten
 
wow you’d be an awful game designer
Background Pony #9793
@Jarkes  
>A Mary Sue is flawless.  
Do you even have an inkling what the term means? Its a blanket term for poorly written self-insert characters writers come up with. There’s a lot of different criteria that any given mary sue character MAY have, but there is no specific things that all mary sues are.  
Common traits include:  
Being overpowered. (Glimmer did overpower an alicorn who had vastly more experience and training in using magic and who had defeated several major foes with her magic in the past, so check)  
Double points for being overpowered, if the character in question has little or no explanation given for how they got so powerful. (Glimmers back story says nothing about where she learned to use magic the way she does, so again, check.)  
Is implausibly skilled. Either one or more skills. (Glimmer modified the time spell to extend the time it could go back from a week to several decades, to allow the caster to bring others along, to stay for however long you want in the past and to allow it to bring people back repeatedly. Twilight was made alicorn for less. Latter, Glimmer combines several different mindcontrol spells on the fly. And again, her background story mentions no advanced training of any kind in magical theory, glimmer specifically did not get to go to the school for gifted unicorns to study advanced magic. Another check.  
Further, since most Mary Sue characters are beloved by their creators, they are usually loved by nearly everyone around then, and anyone who specifically does not, is usually singled out by the author to be an exceptionally shitty asshole. Since there is often little reason given for every other character loving the mary sue, this is usually one of the hallmarks of a mary sue character. (Glimmer is given a stern talking to by Twilight and is now instantly fully redeemed without having to atone for nearly destroying multiple timelines, but is now a close friend of all the mane 6 who is loved so much they barely give her cross words after she mindrapes them all for the sake of her convenience… She is also instantly accepted back into the village she was using as a brainwashing gulag while deceiving and oppressing its villagers. They even expect her to lead the summer sun celebrations. Check and double check for glimmer in this category. That Glimmer is angsty about the whole brainwashing thing does not mean this doesn’t apply, since noone else seems to remember it.)  
Further categories are stuff like being some unique race or an impossible crossbreed, having magically unique looks, changing hair/eye colours and the like and such. Since they are usually inserted into other writers worlds, the creator of the Mary Sue often goes to silly extremes to make their character extra unique. (This is the only category that Glimmer does not get a check in.)
 
TL:DR is Glimmer a mary sue? Regardless of which side of the argument you swear to, there is no denying that she does fit a lot of the classic stereotypes of a mary sue, right down to never actually having been beaten. (Twilight had to talk Glimmer down since she could not beat her in a fight)
LazyRyder
My Little Pony - 1992 Edition

420
Dizzy Pen

Has flaws  
…sadly ignored or just plain forgotten. Like she’s an entire new character.
 
Only had three episodes.  
One where she overshadowed Twilight and made her look bad, another where she did AGAIN brainwashing to solve her problems, and… okay, the Christmas episode is justified. But then the Opener and Finales gave her FAR more focus than Twilight… Like if she’s the new protagonist or something.
 
Pot Kettle  
Some of us were pretty ok with many changes up to Starlight.
Itsthinking
Princess Ember - Derpi Supporter
Diamond -
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Birthday Cake - Celebrated MLP's 7th birthday
Perfect Pony Plot Provider - Uploader of 10+ images with 350 upvotes or more (Questionable/Explicit)
Not a Llama - Happy April Fools Day!
An Artist Who Rocks - 100+ images under their artist tag
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
Silver Supporter -
Happy Derpy! -

🅱
@Blissey1  
Imagine being that much of a contrarian.
Meanlucario
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Shimmering Smile - Celebrated the 10th anniversary of Equestria Girls!
Solar Guardian - Refused to surrender in the face of the Lunar rebellion and showed utmost loyalty to the Solar Empire (April Fools 2023).
Roseluck - Had their OC in the 2023 Derpibooru Collab.
King Sombra - Celebrated the 10th anniversary of The Crystal Empire!
A Lovely Nightmare Night - Celebrated the 12th anniversary of MLP:FIM!
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Elements of Harmony - Had an OC in the 2022 Community Collab
Non-Fungible Trixie -
Kinship Through Differences - Celebrated the 11th anniversary of MLP:FIM!

Time to get spooky
@Wellwater  
Serous about starting shit, too lazy to but effort into it.
Wellwater
Magnificent Metadata Maniac - #1 Assistant
My Little Pony - 1992 Edition
Wallet After Summer Sale -

Just a flurry of H₂O
Wow, that font mismatch tho….
Blissey1
Silver Bit -
Sapphire -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends
Cool Crow - "Caw!" An awesome tagger
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Fine Arts - Two hundred uploads with a score of over a hundred (Safe/Suggestive)
Not a Llama - Happy April Fools Day!
Perfect Pony Plot Provider - Uploader of 10+ images with 350 upvotes or more (Questionable/Explicit)
Magnificent Metadata Maniac - #1 Assistant
Squirrel - "Good idea! If she eats all the prisoners, then that frees up a ton of the taxpayers money!"

@TheNameIsAzureAce  
>comparing battleborn and overwatch
 
welp, you’ve already discredited yourself
Pagan

Gay Viking
She’s not a Mary Sue, she doesn’t hit the right amount of qualifications but I get what you are trying to say.
arcanedarness

@Jarkes
 
Jarkes, please, @TheNameIsAzureAce is a troll. You can see by the discussion in this image, that is summarized in this comment of mine. Simply ignore. Look at its history. It’s a member for 23 days that has only 12 votes but 69 comments (good part of them trolling), and two uploads that are troll images.
Background Pony #F442
I prefer the term Sunset shimmer light
Jarkes
Elements of Harmony - Had an OC in the 2022 Community Collab
Twinkling Balloon - Took part in the 2021 community collab.
My Little Pony - 1992 Edition
Wallet After Summer Sale -
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
Thread Starter - Transformers Thread

GOKAAAAI... SILVER!
But whatever, I’ll go ahead and try anyway:
 
>Mary Sue
 
A Mary Sue is flawless. Starlight has SEVERAL flaws.
 
>shoved down our throats
 
She literally wasn’t even in half the season. In fact, not counting the premiere and finale, she only had 3 episodes where she was a focus, no more than any of the other characters.
 
>Loudmouthed opinions and throbbing Hateboners
 
Yeah, pot kettle much?
Jarkes
Elements of Harmony - Had an OC in the 2022 Community Collab
Twinkling Balloon - Took part in the 2021 community collab.
My Little Pony - 1992 Edition
Wallet After Summer Sale -
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
Thread Starter - Transformers Thread

GOKAAAAI... SILVER!
@TheNameIsAzureAce
 
I can point out several holes in your argument, but knowing people like you, you’d just ignore everything I say and keep screaming about how much you hate her.
TheNameIsAzureAce
Not a Llama - Happy April Fools Day!

You:
 
If you want to see one of those idiots, go look at an Overwatch fantard shill his crappy Tf2/League knockoff while dicking on the superior Battleborn. I can diss Glimmer without “Ordering you to stop liking her”. Unless, of course, your love for her is so weak and ignorant that all I have to do is point out a flaw, permanently reducing your love for her until you’re left with nothing.
TheNameIsAzureAce
Not a Llama - Happy April Fools Day!

Deletion reason: Rule #0
ViperBits
Duck - Abandoned fowl returned to its uncaring owner

@Meanlucario  
Is there even something to fight over? Shouldn’t it be clear to everyone? :|
Meanlucario
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Shimmering Smile - Celebrated the 10th anniversary of Equestria Girls!
Solar Guardian - Refused to surrender in the face of the Lunar rebellion and showed utmost loyalty to the Solar Empire (April Fools 2023).
Roseluck - Had their OC in the 2023 Derpibooru Collab.
King Sombra - Celebrated the 10th anniversary of The Crystal Empire!
A Lovely Nightmare Night - Celebrated the 12th anniversary of MLP:FIM!
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Elements of Harmony - Had an OC in the 2022 Community Collab
Non-Fungible Trixie -
Kinship Through Differences - Celebrated the 11th anniversary of MLP:FIM!

Time to get spooky
@team blueplant  
Sadly, this has became a minefield for both sides, and it doesn’t help that both sides like to fight.
literallywho?
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
Economist -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends.
Condensed Milk - State-Approved Compensation
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.

oh boi
 
here comes the butthurted people