After the green light died down Ben was ghost freak the a green ectonurite with cuff like restraints on his wrists,neck,waist and forearms chains around his torso meeting at the Omnitrix at the chest

Ghostfreak: "Gwen is there anybody inside?"
The A.I version of Gwen popped up "Yes but it's just a robot as well made to look like a human cause i'm not getting any heart beat or brain waves"
The A.I stated
The Ectonurite would smirk if he could that mean no pulling punches
Ghostfreak went invisible to get close enough to twister
Twister: "Come out Red Tornado and face me!!" Bellowed to android he he continued to cause havoc until he felt himself being constricted and slowly being crushed "WHAT IS THE MEANING OF THIS?!" As he turned he saw (Idk how to describe Gax so here's a pic)

His arms were unfolded into tentacles slowly crushing him
Twister: "Un-hand me you beast!" Demanded Twister
Gax: "Look man i'm not in the mood for a prolonged fight ok so i'm just gonna end this quickly"The Chimera Sui Generis said as he crushed Twister into a a pile of metal"Welp that takes care of that" he said while dusting of his hands "Now to go find Harley i can use XLR8 to get-" The Teen Hero was cut off by an explosion on his back "W-wha?" He turned around to see the boy wonder
Robin: "You and your buddy Twister should surrender right now" The boy wonder threatened
Gax: "Um dude you do realise-" Ben was cut off again by someone punching him although he didn't flinch he turned his head to see a teenage boy with black hair ,jeans and a black T-shirt with an S symbol on it the assailant punched him again 3 times in the stomach but Gax didn't move an inch the 4th punch Gax caught it in his left hand which stunned everyone not only did he not even flinch with the kryptonian clone punching him but he caught the punch
Gax: "Can you like not do that I just saved you from that twister guy" he pointed to a crushed twister robot "And you attack me just like that?"
Superboy: "WHO ARE YOU?!" He yelled
Gax sighed: "In this form you can call me Gax but my name is" Gax was engulfed in a green light as he changed back to human "Ben Tennyson nice to meet you" It was silent you could hear a pin drop the 5 sets of eyes were all on him until his Omnitrix's A.I broke the silence
"Unregistered sapient DNA nearby preparing scan" The Omnitrix's face plate opened and a scanner scanned aqualad,Miss Martian and Superboy
After it was finished the A.I spoke once more "Sapient DNA sample acquired new transformations available"
Ben:"Cool looks like got some new transformations now i'll come up with names later tho" he said as he looked at the watch
Superboy: "WHAT THE HELL DID YOU DO TO US?!" Demanded the clone
Ben: "Meh nothing much i planted a deadly disease into you that will slowly eat out your brain until you're nothing but a mindless zombie in my imaginary army for someone with super hearing you're quite deaf" Ben joked
The kyptonian clone had no words to describe how bad he wanted to punch Ben but Miss Martian spoke before he could
Miss M: "Well we will have to carry you to the Justice League in the Hall of Justice can't have a shapeshifter running around" The martian said
Ben: "Fair enough but can we stop by my house and pic up some people?" Ben said as he texted Harley to put on her costume and meet him outside
Miss M:"Sure i don't see why not"She said as the Bio-ship landed"I think she can take a few more people"
As the got in Ben got curious"So your ship is part organic?" The hero asked
Miss M:"Yep why?" She raised an eyebrow
Ben:"I have an organic ship as well" he answered
Miss Martian's eyes "lit up really can we see it?"
Ben:"Well we are gonna pick him up right now" everyone was confused by that statement as Ben got off the ship and saw Harley,Ship and Zed
Harley: "Hey Benny" sees Robin "Why is boy blunder an his friends here?"
But before Ben could reply Robin stepped in
Robin: "I knew you were no good why do you have crazy pants with you is joker here as well?" Robin got ready for a fight
Ben: "Whoa calm down i'll explain everything once we meet the League"
Harley panicked:"WE'RE GOING TO SEE THE LEAGUE WHY?!"
Ben: "Well i got caught using my powers sooo i have to meet the league"
Miss M: "Sorry but she is not getting on this ship" The martian stated seriously
Ben shrugged:"That's cool" He turned to ship"Ship do your thing"
The crew watched in astonishment as ship transformed into a space ship
Ship:"SHIP"
Ben:"We'll follow you guys just lead the way!" Ben stated as Harley,Ben and Zed hopped in Ship
30 minutes later they all arrived in the Hall of Justice
The team and Ben's crew were walking down the hall Ben,Zed,Ship and Harley were admiring the place
Ben:"*Whistles* The place is sick"He turned to his crew"Ok guys stick close to me let me do the talking and DON'T touch anything" The teen hero told them
They nodded their heads and moved along
They kept walking until they saw the Justice League members(Btw this is a hybrid between JLU and YJ around when hawk girl came back) their eyes immediate were on Harley
Harley whispering to Ben: "There staring at me" Harley said as her heart started to beat faster
As hey stood in front the league Ben was the first to speak
Ben:"Hello you must be the Justice League" he extended his arm to Batman"You must be Batman my name is Ben Tennyson"
Batman didn't even acknowledge his hand
Batman:"Why is she here with you she should be in Arkham?" Batman asked
Ben sighed as he put down his hand:"Ok ok i'll explain everything but can we have some privacy?" He looked towards Harley and the Team
Batman:"Excuse us for a while and Harley don't touch anything"He told them Harley stuck her tongue out at Batman as they were leaving Batman then turned to Ben "Now talk" Batman demanded
Ben:"Whoa Bruce no need to get all hasty"
Their eyes widened and their faces were full of shock the kid knew Batman's identity
Ben:"You guys are wondering how i know this well i'm not from this universe and in my universe you all don't exist and i'm the only hero in it"
Superman:"If we don't exist how do you know Batman's real name?"
Ben:"I was getting to that Clark"They once again were dumbfounded by Ben knowing another member's identity "Anyway i was sent here by my immortal time traveling buddy he gave me the history of this world and your history as well including your origins and real names"
Batman regained his composure
Batman:"Then explain why was Harley with you"The caped crusader demanded
Ben:"The name of my friend is Professor Paradox he gave me 2 missions help in anyway i can and save Harley Quinn from the joker the truth is i was the hostage tied to the chair last night and Harley....was suppose to die that night" Ben admitted
The League were wide eyed
Ben continued"She was suppose to stall you from getting to the Joker but while doing that Joker was going to throw lethal toxic gas in the room you survived by putting on your breather thing but...Harley died from breathing in the chemicals"Ben clenched his fist in anger remembering what the professor had told him(yes ik i didn't put where the professor had actually told him it was suppose to be a reveal)
Batman:"Ok now explain your transformation" demanded Batman as he pulled up a picture of Gax
Ben then explained the hold omnitrix thing and how he got it
Ben:"So yeah that's basically it for my 18th birthday the creator gave me Master control so now i've unlocked the full 1,000,912 transformations and I don't need to manually activate the omnitrix I can just think the alien and i become it bonus is no timing out and never have to change back into human" He turned to Batman"I have been warned about you to try and take the omnitrix it's clamped onto my DNA so it won't come off not even the creator can take it"
Batman narrowed his eyes
Batman:"Fine but Harley is your responsibility"
Ben: "Ok also" looks over to hawkgirl
Ben:"Any chance I can let my omnitrix scan you i'd love to change into your species?" asked the teen hero
Hawkgirl shrugged: "Sure"
After the scan
Ben:"I already thought of some great names my Martian form will be "changeling" my kryptonian form will be "Solar storm" my thanagarian form will be "skystrike" still working on my atlantean name"
Flash:"Man we should have let him choose our super hero names those names are awesome!"
Everyone looked at him "what? They are"
Batman: "You said you've been doing this since you were 10 so 8 years right?"
Ben nodded
Batman: "Great you said that your missions is to help us in anyway possible"
Ben nodded again
Batman smirked:"You said you have 4 years experience leading a team right?"
Ben nodded once more knowing where this is going with sweat pouring down his forehead
Batman:" I have the perfect job for you"
Ben gulped:"Is it too late to back down?"he asked
Batman:"Yup get your crew i already told the team to go back to mount justice let's see how they handle the news"
Mount Justice
Recognized Batman bo2 a robotic voice said
Batman:"Everyone gather around i have an announcement to make"
Wally sped in the room as everyone else followed
Wally: "Let me guess you sent the squid face transformer guy packing to his planet and crazy chick to Arkham right?" The speedster said with a smile on his face
Batman smirked which caught everyone off guard
Batman:"Nope I did something worse" He looked back "Come in"
4 figures came out which was revealed to be Ben,Harley,Zed and Ship
Ben and Harley whom looked like they were sentenced to hell
Ship and Zed however ran off to investigate their new surroundings
Batman still smirking he told himself if he was not so composed he would be laughing at the team's faces
Batman:"Everyone meet your new leader and permanent den mother Ben Tennyson and your other permanent den mother Harley quinn"
There was silence the team except superboy just stood there wide eyed and mouth open
Harley:"Is it to late to go back to Arkham?"
Ben:"Is it to late to go back to go back to my universe?"
Batman:"Yep" the caped crusader said walking out as he turned to them with one final smirk"Good luck you two" as the doors close leaving the 2 partys to themselves
Ben:"I hate this already"