Image imported from derpibooru 
Original Description:
 
One day in Canterlot’s shunting yards, sleeping after taking his last train. Although it wasn’t the quietest place to sleep and wasn’t as cozy as his shed, the griffon mogul was happy to have a nap. Gallus’s nap wouldn’t last long as he was woken up by the sound of a blaring whistle. The griffon engine jumped forward, bumping into something, and looked beside him to see Ocellus pulling up beside him. “Gallus, what are you doing?” the changeling shunter asked.
 
“…I’m taking a nap,” he groaned. “Don’t you have any trains to make?”
 
“I do, but you’re blocking a track I need to store Smolder’s lava rock train.” Ocellus paused as she looked towards a derailed truck in front of Gallus. “Did you bump that truck off the rails.”
 
“Something bumped into me,” the truck responded.
 
“Well, I wouldn’t have bumped him if someone didn’t wake me up,” Gallus retorted.
 
Ocellus gave a low brow. “Gallus, the sheds are like a block away from the yards,” she explained. “This isn’t the best place to rest. I have to get Yona’s goods train prepared, Silverstream’s taking a break from her express run to Mount Aris, and Sandbar’s just taking some goods to Ponyville. I’m going my best to help Spike right now.”
 
“But I’ve been working hard all day.”
 
“Gallus, get that truck back on the rails before Princess Twilight has to be involved.”
 
That quickly woke Gallus up. “Um, I’m on it!” He puffed forward and started pulling the truck onto the track. Ocellus smirked as she puffed away to find some tankers for Yona’s good train.
 

 
 
Griffons and changeling have joined the party with Steamquestria. Griffons can go on cloud tracks, like the pegasi or other winged creatures, making them an average type of engine. Changelings, on the other hand, are a very versatile set of engines. They can change their whistles to sound like whatever they want and change their volume, not to mention make various other sounds. Changelings can also shift into any class of engine they want, even changing their gauge of tracks. The only catch is that changelings are that they use up coal and water faster than other types of engines. Even so, they are some of the most useful engines in Steamquestria.