Purpose of the Marks

Sonic was swinging and jumping through the trees while Twilight flies through them zigging and zagging through each of the branches .

"So how's the flying going for ya?" Sonic said in his gruff voice. Twilight looked at herself and then kept going through the woods.

"Well, it's not too bad, I've flown with my alicorn wings before, these are a bit more… flappy, if that's a way to describe it" Twilight absently mindedly out across, unable to describe the feeling of her wings.

"Well, better get used to using those things cause you may be stuck with them for a while." He said as they continued on. As they continued Sonic then had a thought. "Hey Twilight as I can recall you got those wings, I assume you know about your extra strength?" Twilight nodded

"Yes and I also seem to have some cryogenic abilities as well." She said. Sonic was curious about what she said.

"Huh, must've been from the mutation... that's cool I guess." He said as Twilight giggled from his pun he made. "What?" He asked her, he then thought of what he said and then laughed himself.

"Oh, hehe that was unintentional I swear." He said as Twilight's eyes spun from his denial.

"Suuuuuure it was, let's focus on rescuing Fluttershy and Celestia!" She proclaimed as they both run forward to where Eggman was.

MEANWHILE

Eggman was in a secluded cave somewhere in the Everfree forest, he built a lab there with the few things he had with his Egg ship when he came into Equestria with Sonic. He had two cages within there, one containing a yellow pegasus, and a white alicorn in the other one though she looked pale.

"Huff-Huff-Huff, I need to get out of here, I don't know if I can hold on for much longer." She said trying to contain her magic that was still in her body.

"YOU WILL ANSWER TO ME YOU YELLOW EQUINE!" yelled out as he was in front of a cage containing Fluttershy, she was scared of course.

"W-W-What d-d-do you want from me?!" She said quietly as she was scared of what Eggman was going to do.

"Well, from the information I required and by that I mean using my spy camera to spy on all of you I can use you to gather more little animals for my robots!" He said as Fluttershy raised an eyebrow.

"What do you mean? What are you going to do with those little animals?" She said again quietly.

"Why I'll use them as my fuel source for the robots of course!" HAHAHAHA!" He laughed as Fluttershy realized what he said and then felt something come into her being. Rage. She went to where Eggman was and was held back by the bars.

"HOW DARE YOU USE INNOCENT ANIMAL FOR YOUR ROBOTS, YOU SICK BEING!" She yelled out her teeth grating on each other and trying to get Eggman though the bars were impeding her.

"Well, they're my only way of having my army. Now you better comply or I may have to take drastic measures." He asked him though she turned around from him.

"I most certainly will NOT help you! Animals aren't supposed to be used for this!" She said as she didn't even faced him and didn't want to comply. Eggman then growled as he slammed on the glass scaring Fluttershy a little. That's when he turned around.

"Well, you will help me whether you like it or not. As for you Celestia." He said as he turned to the white Alicorn. "You've been a nice power source for my latest weapon." Celestia only gave an angry look.

"You will not get away with this villain." She said to him as he then looks at her and grins.

"Oh, I beg to differ my friend." He said as he powered up the device. "Now all I need to do is find that blue pest and end him!" He said as he went back to his other device.

"W-W-What are you going to do?" Fluttershy quietly said as he turned to her. He was about to speak to her until he heard some rustling and coming inside the cave, he's spotted by Sonic now turned into his werehog state and a pony that looked bigger than the normal ponies here though she had a darker shade of purple, wings that were bat-like.

"Eggman!" Sonic yelled out at his foe, and Twilight snort out in anger as she sees her teacher and her friend in the cages.

"YOU! LET MY FRIEND AND TEACHER GO!" She roared out as her wings flared out in her anger and her horn glows.

"Heheheh, I never thought you'd two would get here sooner, I thought your forms would slow you two down, but apparently I thought wrong." He said backing away from his control set and grabbed a remote into his hand.

"And you can free them for all I care, I already have my device ready." He said as he was putting coordinates on said remote.

"And what's that device of yours Eggman?" He said getting ready to pounce on him, he does so and is blocked by some sort of barrier covering about half the cave.

"HAHAHA, you think I wouldn't think of this before hand?" He said as he chuckles, though he then laughed as he looks at Sonic. "And also the device is a multi dimensional shift that can allow me to go back to our dimension." Sonic's eyes opened up widely as he heard what Eggman said.

Then suddenly a hole starts appearing behind him.

"And as an extra bonus here's a going away present from me to you two." He said as he presses a button on the console and then steps into the hole. The barrier drops and Sonic raced on his four limbs and tries to go after Eggman but the hole dissipates and falls on his body.

"AHH Damn it, he got away!" He said as he then gets up to see an army of egg robos, coming through a portal. He then noticed alongside one the Egg Dragoon and another old mech he remembers from way back then, the Death Egg Robo.

"Oooh Crap." Sonic thought as the gargantuan mech started storming through the cave, breaking through the upper layers of the ceiling. The two dodge the rocks that were falling from the collapsing cave as they go up to the cages of the captured ponies.

"Hold on there, Flutters, I got ya!" Sonic said as he pried the handles off of Fluttershy's cage, and Twilight used her horn to fire ice at the bar and then using her hind legs to break them.

"Princess! Are you alright?" She asks her as she tries to get up though falls.

"I'm ok for now Twilight, I feel weak since Eggman drained me of my magic." She said as Twilight then went up to her and gave her a hoof to walk one, they each got Fluttershy and Celestia out of the cave and then towards the forest as the egg robos and two egg machines start coming out from the cave. Sonic growled at the machines and then they set Fluttershy and Celestia down and then turned to the robots. Sonic then spoke.

"You ready to give your form a real test run Twilight?" He asked her as he smirked. Twilight turned to him and then spoke.

"Let's do this." She said. That's when they jumped at the robots and was about to engage with them.