SorryNeverSorry

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@fastbreak333  
Oh shit, I did. I guess I forgot.
fastbreak333
Cool Crow - "Caw!" An awesome tagger
Magnificent Metadata Maniac -
Artist -
The End wasn't The End - Found a new home after the great exodus of 2012

@Claw  
I really need to get some sleep. I could’ve sworn that said Twilight.
Claw
Non-Fungible Trixie -
Not a Llama - Happy April Fools Day!

SoulsBorne Veteran
@BigBadSeed
 
@fastbreak333  
Twilight is a lamia. Fluttershy is a siren.
fastbreak333
Cool Crow - "Caw!" An awesome tagger
Magnificent Metadata Maniac -
Artist -
The End wasn't The End - Found a new home after the great exodus of 2012

@BigBadSeed  
It’s in the tags, she’s a lamia. Wait, hold on, you asked what the main six were four months ago.
SorryNeverSorry

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What exactly is Fluttershy? I don’t think it’s in any of the tags.
Claw
Non-Fungible Trixie -
Not a Llama - Happy April Fools Day!

SoulsBorne Veteran
Quite fitting choice of monsters, the only thing in my honest opinion is that Dash have too big breasts.  
Its not very aerodynamic if you know what I mean ;D
Black Eyes Blue

@Takengrin Endmmar  
Yes, all of them are! :D
Takengrin Endmmar: Taken God King of Fear
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends
An Artist Who Rocks - 100+ images under their artist tag
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Artist -
Not a Llama - Happy April Fools Day!

Reasonable trolling
Were these some of the monster girls the mane six are crossed over as the ones from the show?
SorryNeverSorry

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@PonyPon  
Cool.
Lord WyrmSpawN
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Non-Fungible Trixie -
Thread Starter - MLP G5 Discussion and Speculation Thread
My Little Pony - 1992 Edition
Wallet After Summer Sale -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends.
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
The End wasn't The End - Found a new home after the great exodus of 2012

Lingering Wyvern
@BigBadSeed  
Aj-centaur  
Rd-Harpy  
Twi-lamia(snake person)  
Rar-Drider(spider person)  
Flut-Mermaid  
Pink-slime
SorryNeverSorry

Offensive. Please ban.
Can someone quickly explain what each of them is?
Background Pony #D804
Deletion reason: Rule #0
Shyette
Lunar Guardian - Earned a place among the ranks of the most loyal New Lunar Republic soldiers (April Fools 2023).
Thread Starter - Yuri (NSFW)
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice

I want coffiee
@Sdf1jjak  
Not here no Sunglasses, see nude version for my thoughts on that.
Ridley Wolf
Not a Llama - Happy April Fools Day!
Artist -

Destroyer of Worlds
@Background Pony #01E0  
Huh. I thought it was just something the writer invented.
Sdf1jjak
Artist -

Where’s Agent Smith?
Shyette
Lunar Guardian - Earned a place among the ranks of the most loyal New Lunar Republic soldiers (April Fools 2023).
Thread Starter - Yuri (NSFW)
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice

I want coffiee
@Background Pony #01E0  
I thought it was just bird brain.
Background Pony #EFED
@Ridley Wolf  
For what it’s worth, monmusu is based on the author’s understanding of the equivalent animal biology. There are a lot of popular urban myths in zoology for some reason, like a year for humans being 7 years for dogs and goldfish having a 3 second memory span. Apparently one of those urban legends in Japan is that birds forget everything after taking 3 steps, which probably originated to explain why birds seem to walk/hop around randomly while hunting for bugs.
Shyette
Lunar Guardian - Earned a place among the ranks of the most loyal New Lunar Republic soldiers (April Fools 2023).
Thread Starter - Yuri (NSFW)
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice

I want coffiee
This version is cute
Black Eyes Blue

Celestia should have been Smith! :P
Tuxisthename
Artist -

Thank god best horse is best monster girl
Ridley Wolf
Not a Llama - Happy April Fools Day!
Artist -

Destroyer of Worlds
@Mad Black  
She’s actually pretty normal after she flies around a bit.  
Her problem is that her brain resets every time she walks three steps.  
Because anime logic.
Chronicle23
Artist -

POPSICLES  
full
Lord WyrmSpawN
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Non-Fungible Trixie -
Thread Starter - MLP G5 Discussion and Speculation Thread
My Little Pony - 1992 Edition
Wallet After Summer Sale -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends.
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
The End wasn't The End - Found a new home after the great exodus of 2012

Lingering Wyvern
@Mad Black  
I think 10 would be enough.
Mad Black
Cool Crow - "Caw!" An awesome tagger
Magnificent Metadata Maniac - #1 Assistant
Speaking Fancy - For helping with translations
The End wasn't The End - Found a new home after the great exodus of 2012

@richfiles  
And her IQ needs to drop by ~25 points. :p  
Because Papi the harpy is a birdbrain.
richfiles
The End wasn't The End - Found a new home after the great exodus of 2012

Dashi’s boobs need to be reduced for this to be remotely close to a proper crossover! :I