Earth

Explosions in a city as Sonic was dodging several energy balls being fired at him by Broly, barely managing to stop himself and dodge Broly himself, who came out of a wall to try to grab him and as he dodged him, Goku came in and kneed Broly in the cheek, only for Broly to slam him down, then grab Vegeta and blast him away.

Sonic sped through the city as shockwaves were caused behind him because of the battle between the 3 saiyans. Sonic was surprised at the scale and intensity of the battle, but kept running through the city to save all of the civilians as Broly was kicked to the ground by Goku and Vegeta, then the two saiyans fired several blasts at Broly before a smoke cloud was made.

''Is it done?'' Goku asked and Vegeta growled.

''You fool! Can't you sense his-WATCH OUT!'' Vegeta shouted as a green blast came out of the smoke cloud and barely missed the two, ''FORGET THIS!''

Vegeta powered up to his super saiyan form and charged at Broly, who he himself turned super saiyan, then they collided blows before Broly slammed Vegeta down and threw him into a building, then fired a blast at the building, causing it to collapse on top of Vegeta.

Goku turned super saiyan and started trading blows with Broly at blinding speeds as Sonic came over and saw it.

''Whoa! They're fast!'' Sonic said to himself before he got serious, ''But I have to help Goku!''

Goku and Broly began doing a test of strength, powering up so much that Sonic is sent back.

''Darn...bad thing is, I don't have any rings.'' Sonic sighed before looking at the fight, ''But there is one thing I can do.''

Sonic began revving up for a spin dash as Broly grabbed Goku, who kneed him in the stomach and kicked him in the neck, only for Broly to uppercut Goku and punch him in the stomach, following with Goku doing a double axe handle and continuing to trade blows with the evil saiyan.

Sonic finished revving up for his spin dash and began to glow light blue, followed by a large light blue aura to emit around him.

''Goku, watch out!'' Sonic said to the saiyan, who teleported away as Sonic smirked.

''Ready?'' Sonic smirked before speeding towards Broly at light speed, ''GO!''

Sonic ran around Broly while punching and kicking him, doing absolutely nothing to him as Sonic sweat a bit.

''...Well, that didn't work.'' Sonic gulped before Broly punched him, then kicked him across the ground as Vegeta came out of the building that Broly caused the collapse of.

As Sonic started to get up, he saw another saiyan, a green man and two bald men coming over to observe the scene.

''Uh...guys...is that Broly?'' the smallest of the four gulped as the green man nodded.

''Yes it is and he needs to be stopped!'' The green man said before all but the smallest one flew towards Broly, who was overwhelming Vegeta as Goku reappeared.

''I think they have this han-'' Sonic started before a large green aura came from Broly, knocking all of the heroes back as Broly began powering up, ''Oh, what now?!''

Broly began to make the ground shake as the Z Fighters looked at the evil saiyan in shock due to the amount of power he gained.

''How did he gain so much power?'' Vegeta asked as Goku was sweating.

''I have no idea, Vegeta…'' Goku said as Broly began increasing in size and strength.

Several lightning strikes were around them as Sonic looked on in shock and horror.

''This will not end well.'' Sonic gulped before Broly glew green and powered up some more, screaming as all of the Z Fighters but Goku, Vegeta, Gohan and Piccolo were sent back from the force.

When Broly stopped powering up, Sonic sped to Goku and Vegeta to catch a sight of Broly, who was now insanely muscular and tall with no pupils and green spiky hair.

''Uh..do you guys know what this is?'' Sonic stammered as Goku and Vegeta regained their composure and frowned, then turned super saiyan 2.

''It's the legendary super saiyan form, hedgehog.'' Vegeta began, ''A form of unimaginable power, so rare that nobody but Broly has achieved it.''

''And now, with his new power, he's unleashing it on earth!'' Goku said before quickly going over to Broly, ''Vegeta, Gohan, Piccolo, Sonic, grab on!''

All 4 heroes put their hands on Goku as he used instant transmission to teleport everyone to another planet.

An unknown planet

Broly powered up, sending them all back, then Broly blasted them all before punching Goku repeatedly, then grabbed Vegeta and threw him into the younger saiyan as Gohan and Piccolo came over.

Broly grabbed both of them and slammed their heads together, then punched Piccolo and slammed him down before blasting him as he elbowed Gohan in the face and kicked him across the ground.

Broly then turned his attention..to Sonic.

The blue hedgehog managed to get up and see Broly was looking at him, causing his blood to run cold.

''Uh..nice saiyan?'' Sonic said, sweating as Broly screamed, almost like a roar, ''OKAY, NOT A NICE SAIYAN!''

Sonic managed to narrowly dodge several fast blast from Broly before Broly flew at him, causing Sonic to scream and run off as Broly again fired several blasts at Sonic, who managed to dodge them all before being grabbed by the leg and slammed down several times before being hung upside down, locking eyes with Broly.

''Okay...you can stop no-'' Sonic started, but Broly slammed him down some more before slamming him down hard enough for him to get stuck in the ground, followed by Sonic having a shaken expression, ''-...I guess not, then.''

Broly flew up and laughed as he charged a blast, only for him to see Goku was in his base form, but had a white glow around him.

''You think a little power up can defeat me again, Kakarot?'' Broly asked before laughing, ''That's nothing!''

''Oh yeah?'' Goku replied before smirking, ''Give me your best shot, then.''

Broly flew at him and collided punches with Goku, causing a large crater to form around them that freed Sonic from his prison in the ground.

''Okay, being stuck in the ground was not pleasant.'' Sonic said as he clutched his arm, ''Don't do that again.''

Broly and Goku traded blows, surprising Broly, who didn't think Goku could stand up to him in base form because of a mere power up.

Broly kicked Goku, only for Goku to punch Broly, followed by Broly punching Goku in the stomach as they went across the ground, trading blows as several shockwaves occur from their fight.

Goku manages to duck as Broly goes for a kick, then does a sweep kick, knocking Broly off his feet before both saiyans fired blasts at the same time, knocking each other back.

Vegeta lands before them and frowns.

''Trying to steal the spotlight again, Kakarot?'' Vegeta asked his rival, who chuckled.

''No, not really...you can have a turn if you want.'' Goku said and Vegeta further frowned as he realized something.

''Why didn't you use super saiyan blue in your fight?'' Vegeta asked and Goku's eyes widened and he laughed nervously.

''Well, I just wanted to test his po-'' Goku started before Vegeta spoke again.

''Whatever, let me handle this.'' Vegeta growled as he walked over to Broly and also powered up, having a white glow around him.

''If Kakarot can't beat me, what makes you think you can!?'' Broly asked the saiyan prince, who smirked.

''Because unlike Kakarot, i'm not naive.'' Vegeta said as a blue aura began surrounding him, causing Broly to frown as he just stood there and watched Vegeta's hair flicker from black to blue repeatedly.

Vegeta powered up more as his hair became blue and Broly was knocked back a bit, but was not launched off of his feet.

Goku just watched and Sonic looked on in surprise.

''Okay, i'm not in their league here.'' Sonic said to himself, ''Not even close.''

Vegeta had a blue fiery aura around him and his skin was lighter with light blue hair.

Broly looked on in shock as Vegeta walked towards him.

''What's wrong 'Legendary Super Saiyan'?'' Vegeta asked mockingly as Broly regained his composure, ''You seem a little spooked.''

Broly simply laughed, causing Vegeta to frown.

''You still cannot defeat me! I am invincible!'' Broly replied

''Oh, really?'' Vegeta asked, '' Then how was it you were defeated by Kakarot the first time? How you were blasted into the sun by Kakarot and his 2 brats? You're not invincible, you fool, you're simply nothing more than a zombie...all brawn, but no brains.''

Broly growled and powered up to his full power, which made Vegeta raise an eyebrow and frown.

''This will not be a fair fight in terms of power, so why even power up?'' Vegeta mocked as he easily dodged several punches and kicks from Broly, then punched him in the face, giving Broly a bloody nose and shocking everyone but Goku.

Vegeta then blocked several kicks from Broly and punched him in the stomach, then kicked him into a large rock before he just stood there.

''What's wrong, already done?'' Vegeta asked mockingly as Broly flew out of the rock, only to run into a knee from Vegeta, who kicked him down to the ground repeatedly as Broly bounced off of it, then fired a blast that sent Broly into the ground.

''No..this is impossible!'' Broly growled, ''I am invincible!''

''I've already proven that you aren't invincible and now i'm proving it again.'' Vegeta snickered, ''Throw everything you have at me!''

Broly laughed and flew up into the air and charged up a large green energy ball, causing the ground around them to crack and break, but this did not faze Vegeta, who simply stood there and smirked.

What surprised Vegeta is that when Broly got done charging the blast, he clutched it with his hand and flew at Vegeta, causing Goku to realize what Broly was trying to do.

''VEGETA, LOOK OUT! HE'S GOING TO HIT YOU FULL FORCE!'' Goku shrieked as Broly threw a punch at Vegeta, but Vegeta barely caught it with his hand, causing a massive explosion because of the blast in Broly's palm.

Vegeta growled before chuckling and punching Broly in the face repeatedly, then threw him up and flew above him, followed by him kicking Broly down and reaching out with his open hand, causing a large blue energy ball to appear.

''TIME TO DIE!'' Vegeta yelled, ''BIG BANG ATTACK!''

Vegeta fired the big bang attack at Broly, causing Broly to be caught in the blast and a large explosion to occur.

When the smoke died down, there was simply a puddle of blood in the middle of the crater, but no sign of Broly.

''Heheh...blown to pieces like the trash he is.'' Vegeta laughed as everyone but Goku's jaws dropped.

Vegeta turned to his base form and flew to Kakarot.

''Now get us all out of here, the planet's about to blow!'' Vegeta yelled as everyone put their hands on Goku, causing Goku to use instant transmission to teleport them away from the crumbling planet and back to earth.

Earth

All of the heroes were teleported back to the city that was being destroyed by Broly as everyone was given a senzu bean by Goku, bringing them all back to full health.

''So..what was all of that?'' Sonic asked and Goku turned to him.

''It's...kind of hard to explain.'' Goku chuckled as the screen faded to black.

BOOM! SECOND CHAPTER DONE! Gohan, Piccolo, Tien and Krillin will have more major roles in the future, I promise!