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Original Description:

It seems that the Diamond Dogs have recaptured Rarity of My Little Pony Friendship is Magic, this time the dogs have learned from their past mistakes. Securing the unicorn to the wagon and gagging her her so she can’t whine at them. This is a request by :iconmightymorphinpower4:
Rarity is a female unicorn pony and one of the main characters of My Little Pony Friendship is Magic. She is Sweetie Belle’s older sister and the subject of Spike’s long-term crush. Rarity works as both a fashion designer and as a seamstress at her own shop in Ponyville, the Carousel Boutique. She has a white Persian cat named Opalescence. She represents the element of generosity.
When Rarity meets Twilight Sparkle for the first time, she is busy decorating Ponyville’s pavilion for the Summer Sun Celebration. As soon as Rarity turns to look at Twilight, she expresses concern for Twilight’s messy mane and practically forces on her the first of many makeovers while the besotted Spike looks on.
Rarity cares for her own beauty as well. She tries to show up Trixie in Boast Busters by making herself a dress from Trixie’s curtain, but Trixie retaliates by ruining Rarity’s mane, making her burst into tears and run away. Rarity is also particular about her cleanliness: she panics while trying to avoid getting muddy in Look Before You Sleep and tries to keep herself from getting soaked in the rain to avoid it messing up her mane. This causes some conflict with her friend Applejack, who is, by contrast, not at all bothered about getting muddy or wet. Her fashion consciousness extends even to times of peril: in Dragonshy, she wears a scarf on the way to the dragon’s lair, wondering if she should carry a tiara to match. She indulges in a full spa treatment with Fluttershy in Green Isn’t Your Color as part of their “weekly get-together”, and she puts on eyelash extensions as part of her gala preparations in The Best Night Ever. In Mystery on the Friendship Express, she wears false eyelashes, and in the latter part of the episode, she wears her hair in such a way to prevent this becoming known to her friends, having lost one of them while trying to make her escape from Pinkie Pie.
Rarity’s mannerisms are similar to those of Scarlett O’Hara, the histrionic anti-heroine of Gone With the Wind. Many of Rarity’s lines are rephrased from lines Scarlett says in the 1939 movie. Her vocabulary is formal, and she is prone to use complex words and more sophisticated, refined phrasing than her friends. As a fashionista, she often uses French-based terms in her vernacular. She speaks with a cultivated trans-Atlantic dialect, and shares some mannerisms with similarly accented Hollywood actresses, such as Katharine Hepburn.​
Rarity sometimes gets carried away with her attention to detail. In Look Before You Sleep, she has difficulty tearing herself away from fixing a messy bookcase despite the much bigger problem of a tree that crashed into Twilight’s bedroom. In Winter Wrap Up, she becomes so preoccupied with fixing Twilight’s messy bird’s nest that she spends nearly the entire day on it, when she was supposed to be producing nests in large numbers.
Rarity shows herself to be tough and resourceful in dealing with the Diamond Dogs in A Dog and Pony Show. Even though the others are worried she would panic over how dirty the underground was, Rarity takes control of the situation quite well, manipulating the Diamond Dogs into releasing her and even letting her have several carts full of gems. Rarity’s prim ways and aversion to disorder and dirt clashes with Applejack’s brashness in Look Before You Sleep. They bicker throughout the episode about each other’s attitude, but they finally unite in the face of adversity when a tree crashes into Twilight’s library. They work together and eventually come to enjoy the company of one another, which becomes more apparent in later episodes. In Over a Barrel, Rarity is baffled at the level of care Applejack bestows on Bloomberg, an apple tree being taken to Appleloosa for planting. Rarity complains that the tree received a private coach; however, Applejack takes this in stride and takes no offense at Rarity’s complaints. Rarity later provides Applejack with much-appreciated support in their attempts to protect Appleloosa from a buffalo stampede. Rarity even comes to compliment Applejack’s manners when she doesn’t charge Rarity for food from her stand at the Grand Galloping Gala in The Best Night Ever.
The Diamond Dogs are a group of dog creatures who first appear as the antagonists of the episode A Dog and Pony Show, led by the three dogs Rover, Fido, and Spot. After they see Rarity using her gem-finding spell, they kidnap her and force her to find gems for them. They are not particularly smart, allowing Rarity to trick them with ease. Their human counterparts appear in the Rainbow Rocks animated short Player Piano and make cameo appearances in My Little Pony Equestria Girls: Rainbow Rocks and My Little Pony Equestria Girls: Friendship Games.
Rover, Fido, and Spot secretly watch Rarity and Spike as they collect gems, initially thinking Spike is the gem finder, before realizing that Rarity is using her magic to find them. They then make themselves known and tell Rarity they hunt for gems, and will hunt for her since she can find the gems. They have a tussle with Rarity and Spike but manage to abduct Rarity into their extensive system of underground mines.
They attempt to force Rarity to find gems for them, but Rarity puts on a complaining and whining act, tricking them into doing all the work while she relaxes and gets pampered. When Rover gets wise to this, he forces Rarity to pull the gem cart, calling her a mule. In response, Rarity acts hurt, crying loudly about being compared to an “old, ugly mule.” By the time Rarity’s friends arrive to save her, the Diamond Dogs are begging for Rarity to leave, even letting her take all their gems with her.
The three main Diamond Dogs wear jackets (with the pockets stuffed full of gems) and diamond-studded collars, while the rest of the Diamond Dogs wear metal armor and carry lances. They alternate between walking on their hind legs and all fours, their elongated forelegs giving them a gorilla-like appearance. They also have short and stubby spiked tails.