My Little Pony Equestria Girls: Monster Mash-Up Musical

My Little Pony Equestria Girls: Monster Mash-Up Musical is a 2023 animated fantasy musical film that takes place in the franchise of My Little Pony: Friendship is Magic/Equestria Girls. It is a special crossover between that and Grimwood Girls. The My Little Pony: Friendship is Magic/Equestria Girls characters are animated by Top Draw Animation, the Grimwood Girls are animated by Digital eMation, and the characters voiced by the guest stars are animated by Tonic DNA.
==Plot Summary==
As Princess Twilight Sparkle and her friends - Spike the Dragon, Pinkie Pie, Applejack, Rainbow Dash, Rarity, and Fluttershy (including Starlight Glimmer and the Great and Powerful Trixie) to Nightmare Night in Ponyville, Sunset Shimmer comes and invites Twilight, Starlight, and Spike to go to the human world for Halloween (the human version of Nightmare Night). As they go to their the Crystal Mirror, Sunset, Twilight, Starlight turn back into humans, Spike turns into a puppy, they reunite their human friends from Canterlot High (except for Twilight's human counterpart, Sci-Twi, who is away on holiday). The Girls felt ready to do some tricks, but they didn't think costumes were scary enough anymore. They all soon encounter the Dazzlings (who have been reformed sometime after their previous appearance), who volunteer to help with their spookiness. They show them their new Halloween invention, called the Monsterfication machine, that can turn any human into real monsters - for REAL. The Girls each take a turn in going through the machine and transform into monsters.
*Twilight Sparkle - a witch
*Rainbow Dash - a vampire
*Rarity - a mummy
*Fluttershy - a ghost
*Pinkie Pie - a werewolf
*Applejack - a Frankenstein monster
*Sunset Shimmer - a swamp creature
*Starlight Glimmer - an alien
*Trixie Lulamoon - a humanoid lizard monster
*Spike - a dragon (his real dragon form from Equestria)
Even though they've been transformed, the Girls still feel, think, and act like their normal selves; even after Halloween, they can still turn back into these selected monster forms at will and also turn back into their true human forms. They were excited with their new monster forms and couldn't wait to test them out for Halloween. After seeing a monstrous threat involving a horde of demons and succubi, the Girls (still in their new monster bodies) go to the world of Monsterdom and meet the Grimwood Girls - Sibella Dracula (vampire), Phantasma (ghost), Tanis (mummy), Winnie (werewolf), Elsa Frankenteen (Frankenstein), Enid (from OK K.O.! - as a witch), Galactica (alien), Lagoona Black (swamp monster), Minimal (humanoid reptile and Godzilla's daughter), and Matches (dragon / pet of the Grimwood Girls), who are celebrating figuring out Sibella's part of a will that leaves her with a hidden treasure that belonged to a late old southern male human, Richard MacWright, that she saved from drowning in a lake a few years ago. The human-turned-into-monster Rainbooms teams up with the Grimwood Girls, and new characters like a motorcycle daredevil human named Henry, a young world-traveling adventuring sorceress named Zoe, and Zoe's 3 companions who are Wild Cats: Jason the jaguar, Tahlia the tiger, and Leonard the lion, to defeat 2 new enemies: a corrupted human accountant named George Sullivan who deeply hates the Rainbooms because of having been dumped by his girlfriend one summer for being their biggest fan at the time, effectively eliminating his shot of becoming a cop, and an evil warlock named Scarface - the leader of the demons and succubi - who wants to take over all of Monsterdom. The Rainbooms and the Grimwood Girls start working together to defeat the 2 evildoers and travel all across Monsterdom to find MacWright's treasure.
Other new characters include: Sarah Scientist - a human scientist and inventor who is a great friend of the Grimwood Girls and provides them with gadgets, weapons, and inventions for their adventure; Mr. Mysterio - Zoe's old magic teacher from high school who eventually retired; Slither - a talking snake who is eventually forced to come with Sullivan on his goal to get revenge on the Rainbooms, but he joins Henry, Zoe, and the Wild Cats at the end; General Grant - a general officer who is in charge of a top secret weapons facility that the Rainbooms and Grimwood Girls visit as the facility was one of Scarface's targets; Jade - a glowing purple banshee who guards the Crystal Cave (one of the Rainbooms and Grimwood Girls' locations on the way to MacWright's treasure); and Igor - Scarface's hunchback assistant who slowly becomes increasingly sick and tired of Scarface mistreating him. He joins Henry, Zoe, and the Wild Cats at the end.
==Cast==
===Equestria Girls/Rainbooms===
*Tara Strong as Twilight Sparkle
*Cathy Weseluck as Spike
*Ashleigh Ball as Rainbow Dash
*Tabitha St-Germain as Rarity
*Andrea Libman as Fluttershy
*Shannon Chan-Kent as Pinkie Pie
*Grey DeLisle Griffin as Applejack
*Rebecca Shoichet as Sunset Shimmer
*Kelly Sheridan as Starlight Glimmer
*Kathleen Barr as Trixie Lulamoon
===Grimwood Girls===
*Chloë Grace Moretz as Sibella Dracula
*Kaitlyn Robrock as Phantasma
*Kyla Rae Kowalewski as Tanis
*Nika Futterman as Winnie Werewolf
*Vanessa Marshall as Elsa Frankenteen
*Dee Bradley Baker as Matches
*Ashly Burch as Enid Mettle
*Kate Micucci as Galactica
*Jessica DiCicco as Lagoona Black
*Myrna Velasco as Minimal
===Guest Stars===
*Justin Timberlake as Henry
*Selena Gomez as Zoe
*Julia Roberts as Tahlia
*Dwayne Johnson as Leonard
*Tom Holland as Jason
*Will Ferrell as George Sullivan
*Benedict Cumberbatch as Scarface
*Kristen Schaal as Sarah Scientist
*Wallace Shawn as Mr. Mysterio
*Kevin Hart as Slither
*Alec Baldwin as General Grant
*Wendie Malick as Jade
*Robert Downey Jr. as Igor
===The Dazzlings===
*Kazumi Evans as Adagio Dazzle
*Marÿke Hendrikse as Sonata Dusk
*Diana Kaarina as Aria Blaze
===Canterlot High and Crystal Prep===
*Nicole Oliver as Principal Celestia
*Teresa Gallagher as Vice Principal Luna
*Britt McKillip as Principal Cadance
*Andrew Francis as Shining Armor
*Michelle Creber as Apple Bloom
*Madeleine Peters as Scootaloo
*Claire Margaret Corlett as Sweetie Belle
*Cree Summer-Francks as DJ Pon-3 (Vinyl Scratch)
*Chantal Strand as Derpy Hooves (Muffins)
*Vincent Tong as Flash Sentry
===School Finders===
*Tress MacNeille as Miss Grimwood
*Jeff Glen Bennett as Colonel Calloway
===Calloway Cadets===
*Scott Menville as Tug
*Bumper Robinson as Jamal
*Rob Paulsen as Miguel
*John DiMaggio as Grunt
*Roger Craig Smith as Baxter
===Other characters===
*Kevin Michael Richardson as A.T.L.A.S. (Advanced Technological Living Artificial Spaceship)
==Gallery==
===Rainbooms (Humans)===
File:Princess Twilight Sparkle (EG).png|Twilight Sparkle
File:Rainbow Dash (EG).png|Rainbow Dash
File:Rarity (EG).png|Rarity
File:Fluttershy (EG).png|Fluttershy
File:Pinkie Pie (EG).png|Pinkie Pie
File:Applejack (EG).png|Applejack
File:Sunset Shimmer (EG).png|Sunset Shimmer
File:Starlight Glimmer (EG).png|Starlight Glimmer
File:Trixie Lulamoon (EG).png|Trixie Lulamoon
===Rainbooms (Monsters)===
File:EG Princess Twilight Sparkle (Witch).png|Twilight Sparkle - a witch
File:EG Rainbow Dash (Vampire).png|Rainbow Dash - a vampire
File:EG Rarity (Mummy).png|Rarity - a mummy
File:EG Fluttershy (Ghost).png|Fluttershy - a ghost
File:EG Pinkie Pie (Werewolf).png|Pinkie Pie - a werewolf
File:EG Applejack (Frankenstein monster).png|Applejack - a Frankenstein monster
File:EG Sunset Shimmer (Swamp Creature).png|Sunset Shimmer - a swamp creature
File:EG Starlight Glimmer (Alien).png|Starlight Glimmer - an alien
File:EG Trixie Lulamoon (Humanoid Reptile).png|Trixie Lulamoon - a humanoid chameleon