A/N: This happens when Ben was 10 years old.
FLASH! FLASH! FLASH!
Ben was currently fighting a man with purple clothes, his name is Eon and he is a chronian who wants to take over the world with his time powers.
FLASH! FLASH! FLASH!
"Agh!"
THUMP!
"Looks like the "hero time" is up, Ben Tennyson!"
Eon had managed to make Ben fall using his time blasts. Ben who was currently in his XLR8 form right now got back up and yelled "I'm gonna give ya a "run" for your money!", "The only thing that's running is your time. Because sooner or later, you'll make a mistake. And that'll be the last time." Eon replied smirking before throwing more time blasts.
FLASH! FLASH! FLASH!
FWOOSH!
Ben quickly swerved around, before hitting Eon in the face hard.
BAM!
"Agh!"
THUD!
Eon fell on the ground, weakened a bit. Just then, two people started helping Ben and firing their blasters at him. One had black hair and a lab coat, the other had long red hair and a brown jacket. Their names were Okabe Rintaro and Makise Kurisu. Ben had met Okabe and Kurisu before, in the one time when he, Gwen and Max were accidentally teleported to their dimension as a result of Okabe accidentally doing something wrong while working on one of his devices.
PEW! PEW! PEW! PEW! PEW! PEW!
"Agh!"
Eon was forced to step back as Okabe and Kurisu continued firing at him. While he was distracted by the lasers, Ben switched to another form and took him down with it.
FLASH!
"Upgrade!"
Ben turned into Upgrade, before going over to Eon and covering him in himself. Then, he proceeded to downgrade his gauntlet-like device.
FLASH! FLASH! FLASH! FLASH!
The gauntlet-like device unleashed a massive burst of purple energy, sending Ben flying into pieces into a wall. Luckily, Upgrade could put himself back together.
FLASH!
SPLAT! SPLAT! SPLAT!
After Ben put all his pieces back together, he fired a huge blue eye laser at Eon. But Eon simply made it stop and go back to him using his time powers.
FLASH!
FLASH!
FLASH!
"WHOA!"
BOOM!
Ben managed to duck just in time. However, his laser blast destroyed a wall behind him. Okabe and Kurisu then started firing their blasters again.
PEW! PEW! PEW! PEW! PEW! PEW!
"Agh!"
Eon was distracted once again as Okabe and Kurisu kept on firing their blasters. Just then
BEEP! BEEP! BEEP! BEEP! BEEP!
FLASH!
"H-Huh?!"
Ben had been transformed into a new alien. It was blue and seemed like it was made from some sort of metal. In the future, he would call this alien "Clockwork". However, it was currently unnamed. "RAAH!" yelled Eon as he blasted a huge time blasts towards him.
FLASH!
Instinctively, Ben blasted a huge blue time blasts of his own from his "core" which was located on his stomach. Then
FLASH!
When the two time blasts met, they created a huge blue and purple flash. It transported Ben, Okabe and Kurisu to another dimension.
FLASH!
"AAH!"
"AAH!"
"AAH!"
When Ben, Okabe and Kurisu opened their eyes, they looked around. "Ungh... Wh-Where are we?" Ben asked, "Hmm, I'm not sure. Everything seems to be the same." replied Okabe. And that did seem to be the case, until
THUMP!
"Oomph!"
"Gotcha now hero girl!"
A black-haired girl with eyes of the same color had been thrown to the ground, she had clothes that were similar to Ben's. The only difference was that she was wearing shorts instead of pants. "Gotcha now hero girl!" a voice then spoke. It came from a girl who was wearing red armor, behind her were two other girls who wore blue and yellow armor respectively. The red-armored girl was called "Rojo", the blue-armored one "Azul" and the yellow-armored one "Amarillo". They were small-time criminals, but that didn't make them any less dangerous than other villains.
"Ungh..." the girl groaned as she got up, "WHOA!" Ben ended up saying in surprise as he saw her. The girl was equally surprised when she heard and saw Ben. Just then
PEW! PEW! PEW!
FWOOSH!
Rojo, Azul and Amarillo fired at the girl, but she ducked and slammed on what appeared to be her universe's version of the Omnitrix.
"It's heroine time!"
FLASH!
"Upgrade!"
The girl transformed into her version of Upgrade, before blasting a huge eye laser at Rojo and her friends.
FLASH!
BOOM!
"AAH!"
"AAH!"
"AAH!"
The explosion sent Rojo, Azul and Amarillo flying. Their motorcycles ended up crashing into things and shattering while they themselves ended up hitting the ground hard. Some parts of their armor even developed some cracks. "Agh..." they groaned as they got back up. "Rojo and her lackeys!" said Ben, before yelling "It's hero time!" and slamming on his Omnitrix.
FLASH!
"Diamondhead!"
Ben turned into Diamondhead, before firing blue crystal-like spikes towards Rojo and her friends. Rojo and her friends ducked, before they got their blasters back and kept on firing.
PEW! PEW! PEW! PEW! PEW! PEW!
BANG! BANG! BANG!
The girl switched to another alien, before blasting fire at them.
FLASH!
"Heatblast!"
FWOOSH!
"Agh!"
Rojo, Azul and Amarillo were forced to get out of the way. While they were distracted by the flames, Okabe and Kurisu used their blasters again. This distracted them enough for Ben to be able to switch to another alien and use and attack.
FLASH!
"Stinkfly!"
SPLAT! SPLAT! SPLAT! SPLAT!
"Agh!"
"Oomph!"
"Ow!"
Rojo, Azul and Amarillo became trapped in the sticky blue sludge, it stunk so that made it worse. Just then
FLASH!
"Cannonbolt Cannonball!"
RUMBLE-RUMBLE-RUMBLE-RUMBLE!
CRASH! CRASH! CRASH! CRASH!
The girl turned into her version of Cannonbolt, before rolling fast towards Rojo and her friends and making them crash through some walls hard. After this, Rojo and her friends were knocked out.
Some Time Later...
"Thanks for the help dude."
"No problem."
"So you said you're a male version of me from an alternate dimension right?"
"Yeah, and you are?"
"Bonita, but you can just call me Bonnie."
Ben, Okabe and Kurisu found out that the girl was a female version of Ben and that her name was Bonita. She had an Omnitrix, but it looked more like the Ben 10 Reboot's season 3 Omnitrix. Just light blue. Just then
FLASH!
"Aha! Found you!"
"AAH!"
"AAH!"
"It's Eon!"
"Wait, Eon?! He must be the reason why you guys are here!"
"Yeah."
"It's heroine time!"
"It's hero time!"
Someone came through a purple portal. -It was Eon! He had finally found Ben, Okabe and Kurisu. Ben and Bonnie both said their catchphrases before slamming on their Omnitrices (plural for Omnitrix).
FLASH!
FLASH!
ROOOAAARRR!
"Heatblast!"
Ben went Wildmutt while Bonnie went Heatblast. Eon became even angrier and tried using a huge time blasts on them, but Bonnie jumped up and blasted fire back.
FWOOSH!
FLASH!
The fire and the blast hit each other, preventing each other from moving any further. Luckily, Ben jumped on and clawed at Eon's face distracting him and making him fall down allowing Bonnie to hit him.
ROOOAAARRR!
SLASH!
"AGH!"
FWOOSH!
Eon was knocked down and weakened a bit from the claw slash and fire, Okabe and Kurisu then took their chances to attack him. They fired their blasters continuously until Eon had been weakened further. Just then
ROOOAAARRR!
SLASH! CR-R-R-RUNCH! CHOMP! SLASH!
"AAH!"
Ben suddenly jumped from above before clawing and biting Eon repeatedly until he was weakened to the point where he had no energy left and was unable to move much.
Some Time Later...
"Well, thanks for helping us Bonnie."
"Thanks for helping me too. I've already got contact with the plumbers of my dimension, so you guys don't need to worry about Eon."
Ben, Okabe and Kurisu thanked Bonnie for helping, and Bonnie thanked them back for the same thing. She told them that she had managed to contact the plumbers in her dimension so they had nothing to worry about anymore. "Well, it's time for us to go." said Okabe, before pushing a button on his phone.
FLASH!
The phone sparked white, before transporting Ben, Okabe and Kurisu back to their dimensions.
FLASH!
When Ben was returned to his dimension, his cousin Gwen and his grandfather Max hugged him. "Ben! What happened?! We were so worried about you!" said Gwen, "Are you alright Ben?!" Max asked worriedly. "Yeah, I'm fine. Me, Okabe, Kurisu and a female version of me just kicked Eon's butt." Ben replied. "A female version of you?!" Gwen asked surprised, although she should've expected this. After all, there are many dimensions across the universe and not all of them are the same.
"Well, we're just glad you're okay Ben." added Max, before saying "C'mon kids, let's get back in our mobile home.". So he, Ben and Gwen did just that.