Robotropolis, a city once called Mobotropolis is home now for metal beings comanded by a mad man, his name? Robotnik AKA Eggman as everyone else call him.
He was just looking in the screen of his computer as he looks the schematics of his other failed plans.'ugh, that stupid rodent arruined another robotizer, at this rate he'll destroy the rest before I can even have another plan.'he throgh.
"Master? He's coming."a red rounded robot alerted him.
'WHAT? ACTIVE THE DEFENSES IMMEDIATELY!"he shouted.
"Already destroyed sir, what we should do?"a yellow squared one asked.
"Ugh, call the SWAT bots to slow him while I activate the Mech."Eggman ordened while he runned to a big room with a big mech, he then begin to insert the emeralds inside the mech to power it."That rat will regret coming here."he said aloud.
As Eggman activated the mech, Sonic break through the SWAT bots with ease."Really Egghead, you think your robots have any change of stoping me?"Sonic asked smugly.
Through a speaker Eggman's voice responded."You'll be sorry for coming here, Sonic!".
Then Sonic foun Eggman inside the Mech."Another mech, really?" Sonic asked anoyed.
"Behold, Mech 3.0!"Eggman said smirking.
"I think you just run out of creativity now, egghead."Sonic said smugly.
"We'll see about that rodent!"Eggman charged it's canon with chaos energy pointing at Sonic.
Sonic dodged the shot in the last second then he spindashed the mech just to be electrocuted and punched on the chest.
"Ouch!... ok maybe a need a little help with this." Sonic evaded a missile while he called tails with his comunicator."Tails, a hand here buddy."
Then suddently the roof came down and the Tornado on his battle mode came down with a two-tailed fox on it's cockpit aiming a blaster to Eggman's then notice the forcefield around it.
"Sonic, he's using a eletrified forcefield around the mech."Tails warned.
"Yeah I see it, how will we pass it?"he asked as he dodged another beam from the mech.
Tails then remenber he has a Power Ring with him."Maybe a Power Ring will do the trick, catch!"Tails then through the ring to Sonic who grab it"Let's do it!"he said as he charged a spindash to the mech, the forcefield begin to electrocut him, but he keep pushing through and finally collided with the mech's armor and riped through it, but he hited a energy core beside the chaos exploding on contact, when he hited the ground, Sonic was already unconscious because of the extreme pain he feel from the eletricity he received.
"SONIC!" Tails shouted, but before he could do anything, sparkles begin shouting from the mech as Eggman exit it with his eggmobile.
"HAHAHA, and now it's your turn!"eggman said as he was aboult to grab a gun from his belt, he hear static from the mech, as he turn around, he became wide-eyed as the mech begin to shine a white light that engulf them, then keeped expanding engulfing half of the city before it's shrinks again and disappear leaving nothing but a big crater behind where once stood half of Robotropolis.
From the distance a echidna looks to Robotropolis as the light dissipates 'What you did this time, Sonic?' he through."better warn the others 'bout this" And he begin to leave to Knothole to warn the Freedom Fighters about it.