A/N: This happens when Ben was 16 years old.
The Tennysons were inside the Rustbucket minding their own businesses when
FLASH!
"AAH!"
"AAH!"
"AAH!"
They were suddenly teleported to another dimension! Just then, they heard loud footsteps.
THUMP! THUMP! THUMP!
This alerted them and made them immediately look behind them. When they did, they saw men in armor with alicorn-dragon hybrids. One of the men had special black knight's armor that stood out from the rest. This is Black Jack, one of the villains that the Tennysons have faced before. But of course they didn't know this yet because his face was covered by his helmet.
"Ah, Tennysons."
However, his voice gave him away, "B-Black Jack?!" Ben said in surprise. "That's right." Black Jack replied, "What do you want?!" Ben asked on. Then, Black Jack replied "Only one thing. The Omnitrix.".
This surprised the Tennysons, especially Ben. Ben knew that whenever a villain wanted the Omnitrix, it wasn't with good intentions. "You're NOT getting the Omnitrix!" said Ben as he placed his hand on it. "Soon, that won't be your decision." Black Jack added, before he summoned his DI-sword Dragon's Flame.
FWOOSH!
Ben became even angrier, before he started to transform.
FLASH!
"Diamondhead!"
Ben turned into Diamondhead, before turning his right arm pointy. Then, he prepared to fight against Black Jack and his army of negalomaniacs. "Seize him!" yelled Black Jack, before his army made their steeds charge towards the Tennysons.
NEEEIIIGGGHHH!
Ben fired blue crystal-like spikes from his other arm, managing to deter some of the steeds. However, some of them managed to get to him biting, kicking and spewing fire at him.
BANG! BANG! BANG! BANG!
NEEEIIIGGGHHH!
BAM! BAM! CHOMP! FWOOSH!
"Urgh!"
Ben grunted as he fought back against these steeds, but they were powerful. He then managed to stab one of them on the neck, killing it.
"YAAH!"
CHAKK!
NEEEIIIGGGHHH!
THUMP!
One of the negalomaniacs fell off his horse, Ben then killed him as well. But with the sheer number of negalomaniacs, the Tennysons soon found it very, very hard to fight against them. "Racta Buoga!" shouted Gwen as she made rocks go through the heads of some of the steeds killing them, she also made rocks go through the negalomaniacs as well. Max fired at and stabbed at them and their steeds with his blaster and its energy bayonet.
FLASH!
BAM! BAM! BAM! BAM! BAM! BAM!
PEW! PEW! PEW! PEW! PEW! PEW!
CHAKK! CHAKK! CHAKK!
Max and Gwen tried fighting back against the negalomaniacs and their steeds as hard as they could, but their numbers were too much and they were forced to back up a bit. Meanwhile
FLASH!
"Upgrade!"
Ben turned into Upgrade, before firing blue eye lasers at the negalomaniacs and their steeds. This made them scatter and run a bit. When they regrouped, they tried attacking Ben again. However, Ben could liquify himself at will in this form and fire eye lasers as well.
FLASH! FLASH! FLASH!
Some of the negalomaniacs fell off and died, Ben was able to take down some of the horses as well. However, they were constantly going after him. And though they couldn't really do much harm to him in this form, he couldn't do anything efficiently because of them. He had to back away a bit.
"Shoo! Shoo!" Max kept on shouting as he continued to fire at and stab at Black Jack's army. However, Black Jack made another move in the battlefield. He struck his sword down near Ben.
CHAKK!
FWOOSH!
"Agh!"
THUMP!
When Black Jack struck his sword down on the ground, it created a huge wave of fire which knocked down and damaged Ben. Ben was able to get back up quickly and keep on fighting. However, Black Jack was no slouch and fought back. The two fought long and hard. But eventually, Ben was able to knock out Black Jack. Of course, he got some injuries. But forms like Diamondhead could just repair them and make them go away.
BAM!
"Agh!"
THUMP!
FLASH!
Once Ben was in his Diamondhead form, he continued fighting with Black Jack's army. Some of the alicorn-dragon hybrids tried spewing fire at Gwen, but she yelled "Sonoris Bumbargos!" first. The spell sent a huge wave of water towards their mouths, temporarily neutralizing their abilities to breathe fire for a while. While they were unable to breathe fire, Gwen added "Soralis Eratanichia!" sending a huge bolt of electricity towards them.
FWOOSH!
SPLASH!
NEEEIIIGGGHHH!
KZZT! KZZT! FLASH!
NEEEIIIGGGHHH!
"HAAH! HAAH! HEEYAAH!" Max kept on shouting as he kept on firing at and stabbing the horses, taking them down one by one. It took a while, but eventually he managed to take them all down. "Ah, that's the last of 'em." he said before looking around. Meanwhile, Gwen was taking out the last of the negalomaniacs. She threw magic blasts almost everywhere and used her spells. Eventually, the negalomaniacs were taken down as well.
FLASH! FLASH! FLASH!
"HAAH! HAAH! HAAH!"
"Agh!"
"Oomph!"
"Argh!"
"Sonoris Fieros!"
FWOOSH!
"Solaris!"
FLASH!
"AAH!"
Max and Gwen looked at the surroundings, all the negalomaniacs and their steeds were down. However...
FLASH!
"RAAH!"
Black Jack suddenly got back up! He sent a huge burst of black energy, making the Tennysons fall down. This surprised them as they didn't expect the villainous negalomaniac to get back up again. Just then
FWOOSH!
"RAAH!"
Black Jack summoned his DI-sword again, before charging towards Ben. Max tried trapping him using power net shells, but they were no use as he just sliced the shells and the nets that came out of them.
SLASH! SLASH! SLASH! SLASH!
"RAAH!"
After that, Black Jack slashed his sword into the air sending a huge wave of fire towards the Tennysons. Luckily, they were able to get out of the way in time. Ben then switched aliens again.
FLASH!
"Wildvine!"
FWOOSH!
BAM!
"Argh!"
THUMP!
Ben turned into Wildvine, before extending one of his arms and quickly punching Black Jack with it. Then, he grabbed some seed bombs from his back and threw them fast at him.
FWOOSH! FWOOSH! FWOOSH! FWOOSH! FWOOSH! FWOOSH!
BOOM! BOOM! BOOM! BOOM! BOOM! BOOM!
"ARGH!"
While Black Jack was weakened a bit, Max and Gwen started firing and throwing laser and magic blasts respectively towards him. This weakened him even further and made him step further back. As Black Jack was distracted again, Ben switched to Fourarms before giving him a hard uppercut.
FLASH! FLASH! FLASH!
PEW! PEW! PEW!
"Agh!"
FLASH!
"RRRAAAGGGHHH!"
BAM!
"Ungh!"
CRASH!
"Ungh!"
Black Jack ended up flying high into the air, crashing onto the ground hard. He managed to create a giant hole with his back. Just then
FLASH!
"Stinkfly!"
FWOOSH!
Ben turned into Stinkfly and flew high into the air, when he was high enough he switched to Cannonbolt before yelling
"CANNONBOLT CANNONBALL!"
He rolled into a big ball, before letting himself fall right on top of Black Jack smashing him into the ground even further.
SMASH!
"Urgh!"
Smoke and dust flew everywhere after Ben smashed Black Jack into the ground even further. Once Ben got off of Black Jack, he saw that he was knocked out and couldn't move anymore. "Ungh..." groaned Black Jack as he just laid there completely. "Nice job, sport." said Max giving Ben a thumbs-up, who gave a thumbs-up back.
Some Time Later...
Max was able to get in contact with Okabe with Ben's help, Okabe was able to send a D-Mail (a text message which can send people in the past, present and future. And it could send people back to their dimensions as well) to send him, Ben and Gwen back to their dimension.
A Few Seconds Later...
Once the Tennysons were back in their dimension, they were relieved. Just then, Ben said "Phew, glad we survived that crazy negalomaniac.". "Man, we're really lucky. That Black Jack guy sure knows how to fight." agreed Gwen. "Well, the important thing is is that we're all back in one piece. Now c'mon, let's get back to our own mobile home." Max spoke. Ben and Gwen nodded in agreement, before going with Max back into the Rustbucket.