Gummy

Gummy is a small toothless green alligator who is kept as a pet by Pinkie Pie. He appears in six different episodes and often bites Pinkie Pie.

Personality
When Gummy is first introduced in Feeling Pinkie Keen, he shows rather jumpy behavior. After Pinkie Pie removes him from the bath tub and sets him on the floor, he proceeds to bite her repeatedly; however, as he has no teeth, this does not harm Pinkie, who barely even reacts. Party of One shows that his behavior is usually more peaceful, and a little more distant, although he still tends to bite whatever happens to be near him, such as balloons or streamers.

Gummy is docile to the point of absurdity in Party of One. In direct contrast with Pinkie Pie's crazed antics, he shows close to no awareness of his surroundings, often standing still and staring into space with the same unchanging expression on his face, though in his first appearance he seems to raise the sides of his mouth to make an almost small "smile." At his birthday party, Gummy "dances" to music by simply waving his tail side-to-side. He also uses a ball of wool as a toy, pushing it along with his nose or riding it as it rolls along.

Pinkie seems convinced that Gummy is much more complex and lively than he appears to be. At the end of Party of One, for example, she says that Gummy was "pretty upset" that his after-birthday party was "cut short" when Rainbow Dash pulled them away, despite the fact that Gummy had shown no change in his behavior or mood whatsoever. In Just for Sidekicks, she even interprets his silence as if he were actually speaking to her.

Just for Sidekicks marks the first episode since Feeling Pinkie Keen that he has any change of expression beyond his vacant stare. He narrows his eyes angrily when Angel mocks him and the other pets at the Cutie Mark Crusaders clubhouse, again when he witnesses Angel trying to ditch them on a train to the Crystal Empire, and a third time with happy relief when Spike's growling stomach is quieted, keeping them safe from detection on the ride back.

History
Gummy is introduced in Feeling Pinkie Keen when Pinkie Pie brings Twilight Sparkle to her apartment to clean her of mud. Pinkie's Pinkie Sense is triggered by "an alligator in the tub," and she promptly fishes out Gummy. Twilight jumps out of the tub in fright, but Pinkie explains that he has no teeth, and Gummy demonstrates his harmlessness by biting Pinkie all over, to no harmful effect. Gummy later appears in Party of One and accompanies Pinkie Pie in her singing telegram, which invited her friends to Gummy's first birthday party at Sugarcube Corner. At his party, he "dances" by wagging his tail, lounges in a punch bowl and the apple bobbing bin, and stands around with a vacant expression, either on fours or on his hind legs. Later, when Pinkie's invitations to Gummy's after-birthday party are rejected, Gummy accompanies Pinkie Pie as she investigates the secret her friends held from her. When she brings Spike in for questioning, Gummy bites on Spike's tail and pulls it back to restrain him. Afterwards, Gummy's after-birthday party is celebrated by Pinkie and her imaginary friends until interrupted by Rainbow Dash, who pulls Pinkie and Gummy to Pinkie's surprise birthday party at the Sweet Apple Acres barn house. Once there, Pinkie realizes that her friends were never trying to abandon her, and she and Gummy enjoy the festivities with the others; Gummy is seen jumping up at a balloon tossed between Applejack and Fluttershy, biting it once it lands. Afterwards, they all agree to include Gummy's after-birthday party in the festivities.

Gummy is later seen in May the Best Pet Win!, participating in the girls' regular "Pony-pet play date" with Pinkie.

He appears again in Just for Sidekicks as one of the pets Spike volunteers to petsit in exchange for a jewel. Here, Pinkie acts as if she understands what Gummy's 'saying', interpreting his silence however she sees fit, and also heatedly asserts that she loves him more when saying goodbye. This is also one of the few episodes where he expresses other emotions beyond his vacant stare, such as disdain at Angel's behavior or relief when Spike and the pets avoid being caught on the train back home.

Gummy's final season three appearance is in Magical Mystery Cure. During What My Cutie Mark Is Telling Me, Rainbow Dash puts him in a birdcage, and by the time of I've Got to Find a Way, he is no longer in the cage.

Design
Gummy is depicted with a forked tongue and bright green scales, akin to snakes and some lizards. Real crocodylians do not possess these traits. Their scales are much duller and their tongues aren't forked and cannot be "stuck out". Gummy's V-shaped snout is more akin to crocodiles, rather than alligators, the latter having a more rounded U-shaped snout.