Psychopathic protector

“How did Eggman of all people even get here?” Sonic asks himself as he continues to run.

“How did you and Justin get here?” Rainbow dash asked, catching up to him.

“We… don't actually know, the most we know is that we aren't from this world.” Sonic explains before looking at Rainbow. “Look, if you see anything made of metal, break it.”

“Uh, only if it's not natural. Because I'm not going to break the train.” Rainbow said with a chuckle.

“Right, I tell you this because Eggman typically uses animals to power his machines.” Sonic explains, only for the two blurs to wince at a shout from behind them.

“HE DOES WHAT?!” Fluttershy's voice booms over them as they look back to see the usually meek Pegasus fuming with rage.

“Uh oh.” Rainbow said with a sweat drop.

“...oh indeed, she reminds me of a certain rabbit friend of mine when the Chao are in danger… and she casually shatters trees.” Sonic replies with a sweat drop of his own before shaking his head. “Whatever, i gotta focus on the now, Rainbow, you and your friends focus on keeping everyone safe and breaking as many Badniks as you can, I'll handle Eggman.”

“Alright.” Rainbow said with a small nod.

Sonic nods with a smirk as he suddenly boosts forward in a blue aura, shocking Rainbow Dash.

“Wha? Hey! You held back during our race!?” She yelled angrily.

-Meanwhile in Ponyville-

“Oh ho ho! With the power of this world's magic my robots will be unstoppable! And with Infinite distracting the rodent back on Mobius there's nothing to stop me!” Eggman gloats to himself with a full bellied laugh.

“Hey egg head, what's up?” Sonic said, running up behind him.

“WHAT?! What are you doing here Sonic! How did you defeat Infinite so fast?!” Eggman shouts as he turns around to look at Sonic, confusing him.

“Infinite? Wasn't he defeated a while ago?” Sonic asked, scratching his head.

“What!? He just arrived!” Eggman yelled in confusion.

‘it's probably another one of Eggman's tricks to confuse me.’ Sonic thinks to himself as he jumps on-top of a Badniks that was sneaking up behind him. “Whatever you say egghead, but I can't let you terrorize this world, so I suggest you leave before I have to break your toys like I always do.”

“Try it rodent!” He shouted, pressing a button in his Eggmobile. “All remaining Badniks! Return to me and Destroy Sonic!”

“Really? You think Badniks are go-gah!” Sonic is interrupted as a dark blue blur slams into him from behind.

“Who said I only had Badnicks!?” Eggman yelled with a laugh.

“Gah! Metal?!” Sonic exclaims as he kicks the robotic duplicate off of himself.

The metal hedgehog slides back, sparks flying off its feet as it does, Metal Sonic glares at its organic counterpart, staring silently with its glowing red eyes.

"Heh, been a while since I've seen you, Copyhog!" Sonic exclaimed with a grin as he boosts forward, curling into a ball as he crashes right into Metal's face, knocking the cobolt blue automaton into a tree.

Dr.Eggman growls at Sonic's attack and shouts. "Quit holding back you fool! Go my Hyper Metal Sonic! Attack!!!" Eggman orders as Metal sonic overclocks its systems and charges at sonic, a yellow sphere of electricity surrounding it.

"Woah!" Sonic exclaimed as he dived to the side to dodge the barreling blue mechanical hedgehog. "Ha! Too slow!"

Sonic turns around and begins chasing Metal Sonic, the two blue blurs racing throughout and around the town at super sonic speeds, clashing every few milliseconds, Sonic breaking Badnik after Badnik throughout their 'race'.

"Ha! This has been fun Metal, but it's about time we end this, don't you agree?" Sonic spoke as he stood on the branch of a nearby tree, Metal sonic floating Infront of him as the metallic hedgehog agrees in silence with a simple nod and glare.

Sonic smirks as he boosts forward, tackling Metal Sonic into a spin Dash, Metal counters with a hard kick to the chin, sending sonic flying into the air, Sonic quickly shaking his head to get his bearings before he curls into a ball and bounces from flying Badnik to Flying Badnik until he eventually lands safely on the ground with a stylised front flip.

Sonic turns and his eyes widen as Metal is already right up Infront of him and grabs him by the throat as Metal slams Sonic down onto the ground, causing the ground to crack and crumble on impact.

"Gah?! H-heh, lucky...hit." Sonic coughed and smirked as Metal raised a clawed hand, prepared to eliminate its target, only for a loud booming wave of sound crashed over the area as a ring of rainbow light is seen bursting into the sky as a bolt of rainbow light crashes down at Metal Sonic at mach speeds, Metal knocked back far as a familiar cocky voice calls out.

"How was this bucket of bolts giving you any trouble Sonic? I mean, come on! I could beat this guy in ten seconds fl-" Rainbow Dash's boasting is interrupted as Metal bursts forward from the wreckage grabbing Rainbow by her wings, and ripping them clean off. "AAAAAGH!!!!" Rainbow shouts in agony as her wings lay on the ground Infront of her as her friends call out her name in horror.

Sonic's eyes widens at his new friends injury before glaring at Metal sonic, a dark glow of seven colours radiate from the satchel on Sonic's waist as his quils begin to darken in colour and his eyes begin to glow pitch white with a dark purple aura radiating around Sonic's entire body, Eggman, spotting this, widens his eyes as he calls out to his robots. "ALL FORCES OF THE EGGMAN EMPIRE, RETREAT! I REPEAT, RETREAT!!!"

Metal Sonic, seeing it's loathsome copy right Infront of it, ignores it's masters command and attempts to strike a killing blow, only for Sonic to already be behind the mechanical hedgehog, holding its core in his hand, which Sonic promptly crushes, causing Metal Sonic's systems to crash and shut down.

Sonic turns to Rainbow dash and approaches the pained Pegasus as the Chaos emeralds contained within the leather bag begin to glow before suddenly flying out of the bag and surrounding Rainbow Dash.

Sonic's quils now returning to their normal shade of blue, passes out as a golden glow surrounds Rainbow Dash.