About two miles from where the two heroes had fought they stopped. The Joker, a man in a purple suit with snow white skin and blood red lips cackled. "Ooh what's this Batman? I thought you only had Robins for sidekicks." He said.
"Joker your mad killing ends here." The apparent Batman said.
XLR8 slapped the Omnitrix symbol and turned into Goop. "I was going for Humungosaur. Oh well I can work with Goop." The Alien said.
"Oooh how can you do that? I want to try that!" Joker said giddily.
"Sorry guy. Trade secret." Goop said. He was pulled the anti gravity to the Joker whom he wrapped himself around.
"Oh my! I can't believe this. Batman you cheater. You know I only set up death traps for you. No fair bringing one of your hero friends along!" Joker said to Batman as if they were an old married couple.
Goop released from him only when Batman through him in the Vehicle. "Ooh hello trunk of the Batmobile how I missed you." The madman said.
Goop turned back into Ben. "Dude for the record I only just met this guy." He said.
Batman got into the Batmobile preparing to drive off. Ben walked over to the otherside. "I don't need your help." Batman said. "Go home."
"Would if I knew how." Ben said. "Figure it out." The Dark Knight said before driving off.
Ben stood there left in the dust. "Aw, Man." He said looking around. "Where am I anyway?" He asked.
"I believe I can answer that question for you Mr. Tennyson." A familiar voice said from behind him.
"Paradox?" Ben asked turning around to face looked at him with a friendly smile.
"Hello Ben. Walk with me?" He asked. Ben nodded and followed him.
As they walked they talked. "You, Ben, are in a different dimension. One that is almost nothing like your own. In this world the plumbers, the Omnitrix, and many of the aliens you know of don't exist. In fact neither do you. This city is called Gotham. It is a crime ridden city. One that is about to have one of its largest problems in this places known history." Paradox said.
"I unfortunately don't have the power to bring you back to your own dimension. Something far more powerful than me brought you here. I can only assume that it'll send you back to your own realm after those events have passed." He said. They turned the corner to find themselves standing in front of a large building.
"However luckily for you I can bring closer to the location of those events." He said.
"Arkham Asylum. Wait I'm supposed to beat up the insane?" Ben asked. "Truly I am not sure. Just play along with the events as they go. I'm sure that you'll figure out what's going on." Paradox replied.
Ben walked past the Batmobile. Batman was taking Joker inside. "Hey wait up!" Ben said.
"I told you I don't need help." Batman said.
"Yeah well I do." Ben replied. "Because apparently there's only one way I can go home and that means sticking with you for a while." Ben said.
"Oooh. You wouldn't turn away a man in need would you Bats. Come along stranger. The more the Merrier." Joker said.
"I'm Ben by the way. Ben Tennyson." Ben said holding out his hand to shake Batman's. Batman didn't even look at his hand. Ben put his hand down awkwardly.
"Hey Kid you can't take personal effects into the Asylum. You have to take off your watch." One of the guards said. "If you think you can take it off be my guest. It's kind of attached to me." Ben replied.
The guard tried to pull the Omnitrix off of Ben's wrist, but to no avail. "Told you. This thing isn't coming off my wrist." Ben said.
The guard nodded while the other guards strapped Joker into a chair. They began to walk down the hallway. As they walked a TV turned on showing a middle aged man. He was slightly plumb, had a bald head, and a mustache.
"Hello patient welcome to your new home at Arkham Asylum where our number one goal is to help restore and rehabilitate the criminally insane. My name is Bishop Warden, and I will be your guide through these trying times." The man said.
"Ooh I love this show. I'm Mr. Stupid man blah blah blah AAHAHAHA!" The Joker said.
Ben looked at the Joker. "How criminally insane are we talking?" He asked a guard. The joker answered for him.
"Oooh the worst kind, If I could I'd destroy the entirety of China and eat it, JUST TO MAKE A CHINESE FOOD JOKE!" Joker cackled.
Ben had gone up against a creepy clown. But, it wasn't the clown motif that made Ben uneasy about this guy. There was something else about him. Something inherently wrong. Something that Ben couldn't quite put his finger on. In fact, he wasn't sure he wanted to be able to.
They walked through the intensive care facility where an older looking man approached them. "Batman. Who's this with you."
"Gordon this is Ben Tennyson." Batman replied.
"Are you sure that having a teenager here with nothing to protect himself in a building full of the most criminally insane people is such a good idea?" The man named Gordon asked.
"Hey. I can take care of myself." Ben said with resentment.
"He's fine Gordon." Batman said.
Gordon walked with them to the holding cells. The two Arkham Staff members stopped Ben and Batman. "Sorry Batman only Arkham Personnel beyond this point." One of them said.
Ben looked at Joker. "I don't think that's such a good idea. This guy might pull something if we don't go in with you." He said.
Batman grabbed his arm. "It's fine. Let's go." He said pulling ben into the security room on their side. Ben nodded and watched feeling in his gut that something was going to go wrong.
Sure enough, the Joker pretended to fall and used the distraction to shoot acid from the flower on his jacket into one of them, and then to break the other one's neck. Ben went into the Omnitrix. "No. You're not getting away. C'mon Ghostfreak." He slammed down on the core of the Omnitrix.
He grew shorter and his skin turned white. His eyes turned rectangular and became completely green with black outline. He looked at his hands. "Echo Echo… figures." He said.
He looked at the glass window that Batman was trying to break. "Stand back." He said. Batman moved out of the way.
Echo Echo began to sonic scream which quickly broke the glass. He multiplied and there were four more of him. "Get him, get him, get him." They said one after the other jumping after Joker. Joker was already on the other side of a security gate at the opposite end of the room.
"Oooh. I just love when you do that." He said. "Now then it's my turn. Harley! I think our boys want to play." He yelled.
At those words all the cells opened and a bunch of inmates walked out. "We're gonna teach you the meaning of pain tiny man." One of them said.
They all ran at Echo Echo who turned to face them. He multiplied again this time making a line spreading across the room. "Wall of Sound." They all said before screaming.
Each of the inmates were thrown into the wall by the sound waves knocking most of them out.
Batman entered the room with him. Joker looked giddy as a child. "Oh I love this Batman. I set the trap and you sprung it gloriously! You even brought even brought a little kid along." He said.
The Omnitrix wielder glared at him. "I'll show you whose little." Ben said. He activated the Omnitrix and strolled through the playlist until he found Fourarms. The faceplate slid back and the core popped up. Ben slammed down on the core again transforming into a very small alien. It had a metal exoskeleton. "Aw, Man. Nanomech is the exact opposite of what I was going for." He said in a high pitched voice
It took a moment before Joker realized had become the tiny object flying in the air. "AAAAHAHAHAHAHA!" He cackled.
"You're going to be stopped Joker." Batman said. Joker left but before he did he looked at them. "Well then by all means. Come and get me!" He said.
Nanomech changed back. The energy field on the other side went down. "Let's go." Ben said but Batman held him back.
"First tell me how that watch is changing you into those things." He said. "Tell me who you are, how you got here… and why I should trust you." He said.
Ben looked at him and smiled. It was a valid question apart from his name Ben hadn't really shared anything about himself. "Okay." He said.
"My name is Benjamin Kirby Tennyson. I'm 16 years old my univers' greatest superhero." He said. "This thing on my wrist is called the Omnitrix." He said raising up for Batman to get a closer look.
"It allows me to change my DNA into that of different alien species in my universe. I have a little bit over Seventy readily available." He explained.
Batman stood for a second processing this information. It was a lot to wrap your head around even for the world's greatest detective. "What do you mean readily available?" He asked,
"I haven't unlocked all of them. Far from it there are still over a million forms for me to unlock, And I can get DNA samples from other alien's to." The teen hero said. "Now should we go? The longer we sit talking the more people are gonna die." He said.
Batman shook his head. "I can deal with this alone." He said walking off,
"Dude… you can't seriously expect me to just sit back and let people die." Ben said running after him.
Joker looked at Ben through the security cams. "That boy's appearance is unexpected. Oh well. It'll be fun to see how he changes things." Joker said.