Mavis, the quarry diesel, has been locked up in the shed for causing a serious accident with some trucks. She wants a chance to prove herself useful again.

When the Fat Controller visits her with important news, it looks like her chance has come, but not quite like she expected. He's having her turned into a pony and sending her to Equestria to work on Sweet Apple Acres for a week. If all goes well, he'll put her to work in the quarry again when she returns.

Can the headstrong diesel engine prove her worth as a pony? Of course she can! Just as soon as she gets used to moving on her own. And eating and drinking. And makes sense of the funny feeling she gets in her chest whenever she meets that big, red stallion...

Cover art by Diamond06mlp

Pre-SugarMac

A Singularverse story

Note: Reading Singularity isn't required to understand/enjoy this story.