As they got back into town, Nyx just made a few brief pauses along the way to ask ponies she met if they recognized the foal of her back, but none of them could say they'd ever seen the little blue unicorn. After thanking the fifth pony she asked, Nebula's stomach started growling against her back, causing her to say, "Oops, are you getting hungry?" When he nodded, she smiled at him. "Well, let's fix that. We can make a quick stop at Sugarcube Corner before we get to the library. I'm sure Pinkie Pie'll like to meet... of course, why didn't I think of that? Pinkie knows everypony, so she's bound to know your parents!"
Nebula smiled cheerfully and exclaimed, "Yay, cupcakes!" Nyx couldn't help but giggle as she changed direction slightly, trotting down the road toward the shop.
Soon, they entered and were surrounded by the smell of sugary treats. They had showed up before the usual lunch rush, so Pinkie Pie was able to break away from the couple of customers who were already there to come greet them. "Hi, Nyx! I didn't know you were a foalsitter. Is that what you've been doing up at the castle?"
Nebula waved with a cheerful, "Hi, Pinkie," while Nyx laughed and replied, "Oh, not exactly. The little guy was lost, so I'm trying to find his house. He got hungry along the way, so I thought I'd stop by here. You wouldn't happen to know where he lives, would you?"
Pinkie stroked her chin as she looked Nebula over, making several contorted 'concentration' faces that made Nebula giggle as he tried to imitate them. "Hmmm, nope! They must not live in Ponyville, because I'd recognize him if he were from around here." Suddenly, the pink pony let out a horrified gasp! "Oh my gosh! That means his parents are probably here in town, searching for their beloved foal... and I haven't thrown them a welcome party yet!"
Nebula gasped at that, clearly sensing the terrible ramifications of this. Nyx chuckled nervously and replied, "Uh... Pinkie, before you go off to do that, can we get a couple of cupcakes for the road? He said his parents told him to go to the library if he got lost, so I'm going to take him there and see if they show up."
"Yes! Yes, perfect!" Pinkie Pie said with enthusiastic focus. "We'll make it a 'Welcome to Ponyville and here's your son back' party! Here, try these, I made them just ten minutes ago!" With that, she offered Nyx and Nebula a couple of heavily-frosted cupcakes before pulling out a notepad to start furiously scribbling out plans.
"A-heh... thanks, Pinkie," Nyx said, leaving a few bits on the counter to pay for them as she left, floating her own cupcake in front of her to take dainty bits as she walked.
Nebula wasn't so well-mannered, instead gleefully scarfing the cupcake and getting crumbs and frosting all over his face. After a few bites, he licked the remnants from his lips and made a happy, contented sound... but then the sugar rush started to kick in, and he hopped off of Nyx's back to start bouncing around.
"Thank you, Nyx, thank you thank you thank you, Nyx!" he exclaimed, hopping about as his horn started to glow. Each hop grew higher as his magic enhanced the lift he got, amusing Nyx at first before she started to get disturbed by just how much air he was getting.
"I-I'm glad you enjoyed it, but don't go too high! I don't want you to hurt yourself," she cautioned, concerned that he might take a bad fall. When he refused to listen to her, though, she then tried to snatch him out of the air with a cushion of her own magic. Even then, though, the giggling unicorn's magic field tried to get him to bounce out of it, forcing her to quickly wrap hers around him completely like a bubble so that he wouldn't squirm out of it.
This normally would have worked, but as she held him in place, the 'bubble' surrounding Nebula started vibrating, building up what felt like a tremendous amount of energy before the baby unicorn suddenly burst free, letting out a gleeful squeal as he rocketed down the street!
Nyx's eyes bugged out in surprise, but she quickly spread her wings and took flight after him as he bounced around like a pinball! Nyx winced whenever he ricocheted off of something, but he seemed to be safely cushioned by his own personal field of magic, and as she gave chase, the greatest danger seemed to be to the town as she had to quickly react to keep the destruction down to a minimum, or to protect ponies in danger of being hit with debris. As such, she wasn't able to catch up with him until his trip came to a sudden, crashing end, making her clench her teeth with worry until she heard his delighted laughter.
Still, she knew there was going to be problems, seeing as how he'd managed to smash into...