Tank

Tank is a tortoise who is introduced in the episode May the Best Pet Win! By the end of the episode, he becomes Rainbow Dash's pet.

History
Tank is introduced in the episode May the Best Pet Win!, but he's named only after being picked by Rainbow Dash as her pet. He is introduced in Fluttershy's backyard along with many other animals, and Fluttershy says he longs to be someone's pet. When Rainbow Dash arrived to get a pet, Tank made many attempts to get Rainbow's attention, but to no avail. Tank persistently tries to get Rainbow Dash to choose him as her new pet, but Rainbow Dash refuses, seeing him as a useless, slow pet that will keep her grounded.

Fluttershy convinces Rainbow Dash to let Tank participate in the competition to determine Rainbow's future pet because "he has always wanted to be a pet." He is not considered pet material at first by Rainbow because he is slow and cannot fly, but wins her over with his tenacity. He is the only animal that helps Rainbow Dash after she gets caught in the avalanche, and helps her when one of her wings becomes pinned under a rock. After Tank frees her, he gives her a ride on his back. She chooses him as her new pet since he was the only pet to cross the finish line with her. In the final scene of the episode, he is seen flying around with a magic-propelled helicopter rotor strapped to his back and wearing aviation goggles, allowing him to keep up with Rainbow Dash and follow her in the air.

Nomenclature
Throughout the episode, Fluttershy insistently corrects others calling Tank a "turtle" to a "tortoise". Near the end of the episode, she uses "turtle" herself, and all of her friends correct her in unison. The use of either term to describe terrestrial turtles may be acceptable in some circumstances.

Gallery

 * Tank image gallery

Trivia

 * A Rainbow Dash toy that comes with a turtle was presented at ASM's 2011 Toy Fair, and later sold in retail. The episode was written at about the same time, about a year prior to the episode's airing.
 * Tank is the first new pet introduced in season two.
 * How Tank came to be Rainbow Dash's pet is similar to the story in Aesop's Tortoise and the Hare.
 * The design of the shaft of Tank's helicopter like flying machine has been used for background weather vanes in previous episodes.