Lunacy:

Twilight Sparkle
Sunset Shimmer
Lightning Dust
Spike
Shining Armor
Diamond Tiara
Silver Spoon
Cadance
Flash Sentry
Scootaloo
Rarity
Beth Drollins
Rosely Reigns
Diane Ditzbrose
Lyra
Bon Bon
Flitter
Cloudchaser
Snails
Snips
Fancypants
Overdrive
Vultarian
Fleur De Lis
Fluttershy
Adagio Dazzle (yet to debut)
Sonata Dusk (yet to debut)
Aria Blaze (yet to debut)
Suri Poloman (Manager)
Bulk Biceps
Berry Punch
Bill Nyeker
Dwight Dawson
Xavier Kendrick
Hugh Jelly (Inactive due to Dislocated Shoulder)
Giz Hero
Turf
Hoops
Dumb-Bell
Twist
Gustave Le Grand
Maud Pie
Tom (Manager of Maud)
Honeycomb
Midnight Strike
Neon Lights
DJ Z
Rumble
Thunderlane

Silver Shill (Backstage Interviewer)

Madden (Announcer)
Ahuizotl (Commentator)
Garble (Commentator)

Authority Figures:
Star Swirlanaitis (Executive Vice President of Talent Relations)
Luna (General Manager)

Sublime:

Rainbow Dash
Pinkie Pie
The GREAT and POWERFUL Trixie
Spitfire
Soarin
Big McIntosh
Amira
Haakim (Personal Ring Announcer of Amira)
Apple Bloom
Applejack
Colgate
Damien Sandow
Sweetie Belle
Octavia
Zack Ryder
Aloe
Lotus Blossom
Cheerilee (Currently Inactive due to injury)
Daring Do
Braeburn
Blueblood
Starlight Glimmer
Dr. Caballeron
Caramel
Photo Finish
Private Panzer
Granny Smith
The Underbaker
Vinyl Scratch
Hoity Toity
Pipsqueak
Red Delicious
Golden Delicious
Happy Trails
Ace
Inkie Pie
Blinkie Pie
Steamer
Babs Seed
Private Panzer
Uncle Wing
Sour Tooth

Starlight Glimmer (yet to debut)
Nurse Redheart
Pretty Vision
Iron Will (Pretty Vision's manager)
Davenport
Check Mate
Commander Hurricane
Squire (Personal Ring Announcer of Commander Hurricane)

Marigold (Backstage Interviewer)

Baritone (Announcer)
Discord (Commentator)
Dr. Whooves (Commentator)

Authority Figures:
Celestia (General Manager)

Tag Teams:

Lunacy:

Turf and Silver Spoon.
Lyra and Bon Bon.
Flitter and Cloudchaser.
SLIME (Snips and Snails)
EGO (Gustave Le Grand and Fancypants) (With Fleur De Lis as manager)
Hoops and Dumb-Bell
NION Lights (Neon Lights and DJ Z)
Maud and Berry Punch
The Teacher's Pets (Dwight Dawson and Xavier Kendrick)
The Wythyst Family (Ericka Rowan & Lucy Harper)
Midnight Strike and Honeycomb
Vultarian & Overdrive
Fluttershy and Lightning Dust

Sublime:

Sour Tooth and Babs Seed
Aloe and Lotus
The Ghost Girls - Inkie Pie and Blinkie Pie
Soarin and Spitfire
Red Delicious and Golden Delicious
Braeburn and Happy Trails
Canterlot Class - Hoity Toity and Blueblood
Couch-Mate - Davenport and Check Mate
The Apple Dynasty can also contain many tag teams
Rack Attack - Ace and Zack Ryder
Uncle Wing and Steamer

Stables:

Lunacy:

The Wythyst Family - Amay Wythyst, Lucy Harper, Ericka Rowan
The Substitutes of Salvation - Bill Nyeker, Dwight Dawson, and Xavier Kendrick
The System - Luna, Mr. Swirlinaitis, Sunset Shimmer, Shining Armor, Snips, Snails
3MB - Adagio Dazzle, Sonata Dusk, Aria Blaze (yet to debut)
The Sword - Beth Drollins, Diane Ditzbrose, Rosely Reigns

Sublime:

The Apple Dynasty - Applejack, Big MacIntosh, Apple Bloom, Granny Smith, Braeburn, Red Delicious, Golden Delicious, Happy Trails
Apple Corre - Big MacIntosh, Apple Bloom, and Applejack (Managed by Granny Smith.) (Mini-stable that coincides with The Apple Dynasty.)
Canterlot Class - Octavia, Hoity Toity, and Blueblood

Champions:

Lunacy:

Women's Eternal World Champion: Sunset Shimmer
Champion of Carnage: Rumble
Chick Combo Champions: Fluttershy and Lightning Dust
Crater Chick Champion: Vacant

Sublime:

World Fighters Champion: Rainbow Dash
World Brawlers Champion: The Underbaker
International Champion: Octavia
Sublime Tag Team Champions: Babs Seed and Sour Tooth

Shared:

Combos of Carnage Tag Team Champions: Zack Ryder and Ace