Beau Skunky
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends
Cool Crow - "Caw!" An awesome tagger
Magnificent Metadata Maniac - #1 Assistant
Artist -

Big is Beau-tiful
Does this mean Dr. Hooves & Derpy Doo are Dr. Bunsen Honeydew & Beaker?
cheezedoodle
Roll for Initiative - For Patreon supporters
A Lovely Nightmare Night - Celebrated the 12th anniversary of MLP:FIM!
The Power of Love - Given to a publicly verified artist with an image under their artist’s tag that has reached 1000 upvotes
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Non-Fungible Trixie -
Thread Starter - OC Tag Description Requests
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
The Magic of Friendship Grows - For helping others attend the 2020 Community Collab
Dream Come True! - Participated in the MLP 9th Anniversary Event
Silver Bit -

Moderator
TagZombie: AC15, Atk +8
Okay, the casting as near as I can figure it here:
Applejack as Rolf and/or Doctor Teeth (not what I expected)
Fluttershy as Gonzo (what possessed them to do that?)
 
Definitely Rolf.
 
Chickens!
Swashbucklist
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).

...
Luna: “I wonder who was responsible for that pie…”
 
Celestia: “As long as she’s done telling jokes, it doesn’t splatter to me!”
 
“DOOOH-HOHOHOHOHOHOHO!”
Background Pony Number 17
My Little Pony - 1992 Edition

And of course Pinkie Pie as Fozzy Bear, which was obvious but kind of rough on poor Pinkie.
Background Pony Number 17
My Little Pony - 1992 Edition

Okay, the casting as near as I can figure it here:
 
Twilight Sparkle as Kermit the Frog (makes sense)  
Rarity as Miss Piggy (sadly, also makes sense)  
Spike as Scooter (makes way too much sense)  
Applejack as Rolf and/or Doctor Teeth (not what I expected)  
Fluttershy as Gonzo (what possessed them to do that?)  
Rainbow Dash as Animal (not my first choice, but okay)  
Celestia and Luna as Stadtler and Waldorf (now THAT’S truly inspired!)
Ardashir
My Little Pony - 1992 Edition

@Dustcan  
So, Rainbow Dash punched reality? Here I thought Discord would be the one who did that.
Dustcan
Magnificent Metadata Maniac - #1 Assistant
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).
Non-Fungible Trixie -
Preenhub - We all know what you were up to this evening~
Twinkling Balloon - Took part in the 2021 community collab.
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
Wallet After Summer Sale -
Condensed Milk - State-Approved Compensation

Dogs
“A storyline that will lead to major changes in MLP comics!”
 
A damn. Rainbow Dash finally flew so fast she caused a time boom.
 
It’s Pony 52 everyone.
Ardashir
My Little Pony - 1992 Edition

@TheOtherPinkiePie  
I’d love it if they could somehow do MLP like the old Muppet Show with those guest stars. Sean Connery, Vincent Price, Carol Burnett, heck they even had Luke Skywalker, Chewbacca, and the droids show up!
Background Pony #7299
“A storyline that will lead to major changes in MLP comics!”
 
Inb4 a reboot of everything in the #50
Background Pony #2571
full
TheOtherPinkiePie
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.
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.

Bleh...
“It’s the My Little Pony Show with our very special guest star, DISCORD! YAAAAAAAYYYYY!!!!!”
digiman619

It’s time to play the music!  
It’s time to light the lights!  
It’s time to meet the ponies,  
On the Pony Show tonight!