My Little Pony: Friendship Is Magic2010

Rainbow Dash:
Spike, take a letter. "Dear Princess Celestia, I used to think that the most important traits to look for in a pet, or any best friend, were all physical competitive abilities. But now I can see how short-sighted and shallow that was. Today I learned what the most important quality really is. A certain kind of spirit. A stick-to-it-ive-ness. A never give up, can-do attitude that's the mark of a real winner. And this tortoise has it."

Twilight Sparkle:
Tenacity.

Rainbow Dash:
Gesundheit. You just can't stop that little guy. He's like a... like a... tank!

Fluttershy:
But Rainbow! You didn't want a pet that couldn't fly because it would keep you grounded and hold you back, remember?

Rainbow Dash:
Hmm...

Rainbow Dash:
[the next day, the six friends come back to the park with their pets, and Rainbow Dash is with them, with her new pet tortoise] Heh. C'mon, Tank! We're gonna be late for our very first Pony Pet Playdate! [Tank follows her in a helicopter-propeller suit on his shell, powered by magic, that lets him fly anywhere]