Hello, everyone! PHANTOMKNIGHTMARE47 here with my first-ever crossover between two of my FAVORITE video game franchises: Sonic The Hedgehog and MegaMan! It's called: When Worlds Collide 3! Basically, after the events of Sonic Forces, Sonic and his friends are still recovering from when Eggman took over Mobius, and Eggman has been arrested. However, Sigma, Vile, and a new group of Maverick Reploids arrive on Mobius, and break Eggman out of Zone Prison, with some other members of Sonic's rogues gallery. Luckily, X, Zero and Axl arrive on Mobius to help Sonic and co. in defeating Eggman, Sigma, and these new Mavericks before they cause harm to the people of Mobius.

Pairings: SonicxRouge, OCxAmy, TailsxFiona, KnucklesxShade, ShadowxOC, SilverxBlaze, CyoxBonnie, NoahxNoire, etc.

Disclaimer: Sonic The Hedgehog is owned by SEGA, Sonic Team, Archie Sonic Comics, and IDW Sonic Comics. MegaMan is owned by CAPCOM and Archie Comics.

OCs are by me, WOLFWATCHER12, CyotheLion, ScottishArtGuy, Sonicfan2500, and so on.

Chapter One: The New Threat

Location: Planet Mobius

It cuts to the 'Fastest Thing Alive' himself, Sonic The Hedgehog sprinting throughout the fields of Green Hill Zone, normally he'd be with some of his friends like his surrogate little brother, Miles 'Tails' Prower, but this time, he was alone.

'I've been having the worst of luck with women, lately.' thought Sonic 'First I found out that Sally was being impersonated by Alicia Acorn, which is why she and I broke up, and then I learn that Amy is dating another guy named Devon, who is one of Tangle's cousins. At least old Eggstache is behind bars.'

Recently, Sonic had broken up with his former crush, Sally Acorn, and he recently found out that Amy Rose, his self-proclaimed number one fan, had moved on and started dating Devon The Lemur. He then looked to see some Eggpawns.

"What the hey?" Sonic blurted out, sounding like how he does in the live-action/CGI film

(Author's Note: In my universe, Sonic will be voiced by Ben Schwartz, so he sounds like how he does in the film, since Ben makes Sonic sound like a teenager again. Roger makes Sonic sound too much like an adult, and Jaleel White is too whiny)

"I thought that after Eggman got arrested, the production of his robots was halted for good!" said Sonic, stunned to see some Eggpawns terrorizing the people of Mobius. He then flashed a determined look on his face 'No time for second-guessing. Bash the bots into scrap-metal, and save the town. Simple as that.'

Sonic then looked to see a yellow-colored blur zip by, and smash some Eggpawns into scrap-metal. He then looked to see a female Mobian cheetah with marigold colored fur, short, black hair, and dark purple eyes wearing a red tank-top over a black jacket, jeans, a belt with a skull shaped buckle, and boots.

"I hoped that Eggman's factories would stop producing robots after he got that life-term in Zone Prison." said the cheetah, sounding like Lily Chilman, the Jungle Fury Yellow Ranger from Power Rangers Jungle Fury. "I guess some evil scientists never learn from their past actions."

"Agreed." said Sonic, nodding in agreement. "I'm Sonic. Sonic The Hedgehog."

"I'm Madison Cheetah, but you can just call me Maddie." said the cheetah, speaking to Sonic.

Meanwhile, with Eggman in his cell, he was wearing the standard-issue orange Zone Prison jumpsuit, and he was reading Carrie, by Stephen King.

"Good news, Ms. Fox, you've paid your debt to society, and Mr. Prower has decided to pay your bail." said the warden, speaking to Fiona Fox, as Tails smiled a little

"My mom always says there's good in pretty much everyone. Even the worst of them." said Tails, as Fiona hugged him, crying.

"Thank you, Tails." said Fiona, with tears in her eyes "For never giving up on me."

"No problem, Fi." said Tails as he and Fiona left the Zone Prison. Eggman, on the other hand, was left seething with rage

'Goddamn that meddling hedgehog, Sonic!' Eggman groused in his head 'I swear to you, I'll get even with him and his worthless friends, even if it's from beyond the grave!'

Suddenly, someone teleported Eggman back to his base, much to his surprise.

"What the?" said Eggman, until he looked to see two figures. One of them had a bald human head with a cleft chin, and his eyes were pure white without a pupil or iris to be seen. He looked to be tall and bulky, and he wore green and purple armor.

The other looked to be a figure in purple armor, with a helmet that had a 'T'-shaped visor covering his face. On his shoulder was a cannon with an ammo belt to it.

"Dr. Ivo Julien Robotnik, I presume?" said the bald figure, looking at the not-so-good doctor.

"Who the Devil are you?" said Eggman, with a quizical look on his face

"I am Sigma." said the bald figure, introducing himself to Eggman "And this is my right-hand-man, Vile."

"I heard that you allied yourself with Doctor Wily, and turned some of Sonic's friends into your 'Roboticized Masters', but still got defeated by Sonic and the original MegaMan." said Vile

"You read me like an open book." said Eggman, defeated.

"Listen, we can help you deal with Sonic and his loathesome friends. PERMENANTLY." said Sigma

"How so?" said Eggman, curious

"We could send one of our best Mavericks to slaughter Team Sonic." said Vile "And in the worst way possible, too."

"Whoa, whoa, whoa!" said Eggman "I wouldn't go as far as to murder Sonic! I just want him out of the way!" Eggman pressed a button on the bottom of his desk, and Scratch, Grounder, Coconuts, Decoe, Bocoe, Bokkun, Orbot, Cubot, and Metal Sonic arrived.

"We heard the silent alarm, Doc!" said Grounder "What gives?"

"Show them exactly 'what gives', Frost Direwolf." said Sigma, as a robotic humanoid wolf that looked like a hybridization between Blizzard Wolfang from MegaMan X6 crossed with Fenri Lunaedge from MegaMan Zero 4 appeared. He was cyan, metallic blue, and white in color with red eyes.

"With gusto." said Frost Direwolf, sounding like Alucard from Hellsing, as a pair of curved blades made of ice appeared on his forearms, and he sent a shockwave slash at some of Eggman's robots, slicing them apart and creating ice crystals on the ground.

"I'll deal with tall, bald and ugly, Doc!" said Metal Sonic as he lunged at Sigma, only for the tall Reploid to clutch Metal Sonic's arm before he could land a punch, and slowly started to crush the robot copy of Sonic's head

"What...what're you...!?" Metal Sonic got out

"I'm sorry, Metal Sonic, but you can consider yourself OBSOLETE." said Sigma, in a dark tone of voice as he crushed Metal's head to scrap metal, and destroyed his CPU.

(Author's Note: The scene in where Sigma kills Metal Sonic is based off of the brutal death of Josef/Red Rush at the hands of Nolan Grayson/Omniman from the animated TV series adaptation of Invincible)

"OH MY GOD, HE KILLED METAL!" said Scratch, horrified to see Sigma kill Metal in such a horrific fashion

"You bastard...YOU GODDAMN BASTARD!" said Grounder, with tears of rage streaming down his face as he glared at Sigma

"Unless you wish to end up like the obsolete model, I suggest you OBEY me." said Sigma, glaring at the rest of Eggman's robotic henchmen.

"Y-yes sir." said Coconuts, kneeling before Sigma, along with the rest of Eggman's subordinates. Suddenly, more Mavericks arrived. One looked like Dark Mantis crossed with Deathtanz Mantisk and a Berotha Magia, one looked like Insomniac Rhino crossed with Metalgelas, one looked like Panter Flauclaus, but different. One looked like Storm Eagle crossed with Falzar Beast Out , but colored jet black, midnight purple, and dark silver. One looked like Magma Dragoon crossed with Incursio, with large wings jutting from his back. One looked like Hyleg Ourobuckle, one resembled Slash Beast, one resembled Hanumachine, but with a different color scheme. One resembled Heat Gemblem, but colored black, gunmetal grey, and vermillion red. One resembled Magma Dragoon, but colored cyan, silver, and white, one resembled Panter Flauclaus, crossed with Destwilder from Kamen Rider Ryuki, one resembled Blaze Heatnix crossed with Falzar Beast Out , one resembled how Scorpion does in the Superior Spider-Man crossed with his PS4 counterpart, and there were other different robots.

"Starting today, the Eggman Army is under new management." said Sigma, grinning maliciously

(End of Chapter One)

Next Time: Sonic and the gang learn that Eggman is working with Sigma, and that Fiona is rejoining Team Sonic. They later get three new allies in the form of X, Zero and Axl. They later learn that Frost Direwolf is causing havoc in the Ice Cap Zone, and it's up to the heroes to defeat him!

Find out in Chapter 2: New Friends, and Newer Foes