Okay. This is the cast I created.
Earthling Mares (12)
Applejack
Bow-Tie
Bubbles
Cherries Jubilee
Cupcake
Lickety-Split
Magic Star
Posey
Seashell
Shady
Sundance
Truly
Pegasus Mares (12)
Blueberry Baskets
Bouncy
Firefly
Heart Throb
Lofty
Medley
North Star
Paradise
Surprise
Tiffany
Twilight Hope
Wind Whistler
Unicorn Mares (12)
Buttons
Fifi
Glory
Gusty
Moondancer
Powder
Ribbon
Skyflier
Sparkler
Sunbeam
Twilight Mist
Twist
Earthling Stallions (8)
Four-Speed
Half Court
Quarterback
Salty
Slap Shot
Slugger
Steamer
Tex
Pegasus Stallions (8)
Atlas
Brochure
Compass
Contrail
Jet Streak
Monsoon
Trade Wind
Wind Break
Unicorn Stallions (8)
Babel
Barricade
Fireball
Ice Crystal
Lightning
Sunburst
Thundercloud
Tornado
Rainbow Ponies (4, 2, 2)
Confetti (Earthling)
Moonstone (Unicorn)
Parasol (Earthling)
Skydancer (Pegasus)
Starflower (Unicorn)
Starshine (Pegasus)
Sunlight (Earthling)
Trickles (Earthling)
Twinkle Eye Mares (4, 3, 3)
Fizzy (Unicorn)
Galaxy (Unicorn)
Gingerbread (Earthling)
Locket (Pegasus)
Masquerade (Pegasus)
Mimic (Unicorn)
Quacker (Earthling)
Sweet Stuff (Earthling)
Tic-Tac-Toe (Earthling)
Whizzer (Pegasus)
Twice as Fancy Mares (4, 1, 1)
Bonnie Bonnets (Earthling)
Dancing Butterflies (Pegasus)
Love Melody (Earthling)
Milkyway (Unicorn)
Night Glider (Earthling)
Sugarberry (Earthling)
Twinkle Eye Stallions (4, 3, 3)
Afterimage (Unicorn)
Backhoe (Earthling)
Dune (Earthling)
Eclipse (Unicorn)
Gator (Earthling)
Mercator (Pegasus)
Piton (Earthling)
Scud (Pegasus)
Stargazer (Unicorn)
Squall (Pegasus)
Twice as Fancy Stallions (4, 1, 1)
Hurricane Warning (Pegasus)
Klondike Night (Earthling)
Litmus Test (Unicorn)
Pondarosa Timber (Earthling)
Radio Waves (Earthling)
Sidecar (Earthling)
Fillies (2, 2, 2)
Little Buttons (Unicorn)
Little Heart Throb (Pegasus)
Little Lickety-Split (Earthling)
Little Lofty (Pegasus)
Little Ribbon (Unicorn)
Little Sundance (Earthling)
Colts (2, 2, 2)
Contrail Junior (Pegasus)
Jet Streak Junior (Pegasus)
Quarterback Junior (Earthling)
Sunburst Junior (Unicorn)
Tex Junior (Earthling)
Thundercloud Junior (Unicorn)
Suggestions? Additions? Subtractions?