A/N: Thanks for all the rewiev and criticize. It means a lot and I'll try to do make it better. I'll have OG aliens, Aliens from reboot like Gax or Rockshock. And aliens we saw in the Prime Ben adventures but Ben didn't transform. Omnitrix still have the evolution function. Enjoy the chapter. He shouts his aliens name too and I know he didn't in the first chapter. I thought it would be fun to add so I'm adding it in this chapter.

Gotham's cold air was hitting Ben in the face while he and Batgirl watching the city from a rooftop. Ben kept his usual clothing but his hoodie was on and he had a mask that covers his mouth and nose. His eyes were the only thing that can be seen.

"I still can't believe I'm wearing a mask." Ben said. When Batman said he had to hide his identity, Ben was skeptical cause he was so used to being famous and stay in sight back at home.

"Calm down Benji. It's not the end of world but in here you have to hide your identity. You are pretty powerful and we don't wanna anyone bad finding about you." Batgirl said. She was really enjoying Ben's company. So far they stopped some robberies. Ben didn't even had to transform.

Ben turned to her with a smirk. "Afraid I'll become famous and forget about you." Same could say for Ben too. He was really enjoying this patrol so far.

Batgirl scoffed. "As if." Her purple and yellow mix suit was outstanding in Ben's eyes. Though something didn't sit with him very well.

"How in the world people didn't found about your identity? Your mask covers like nothing dude." Ben asked. Barbara's mask covered her top of head. Her eyes were can seen and her hair was coming out from back of her mask.

Barbara just shrugged. "Don't know. Dumb luck I guess." Before Ben could continue their conversation, an explosion rudely cut them off.

Ben threw his arms in the air. "Come on dude. Can't have a conversation?" Ben said to universe I guess. Barbara just giggled his actions. But her face immediately turned into a serious one. An explosion in Gotham was never good.

"We gotta get there and investigate." Barbara said as she ready her grappling hook but Ben stopped her as putting his hands on hers.

"I'll get us there in a blink." Ben said and an emerald light consumed the area and of course cause Barbara to shield her eyes. When light died down instead of Ben, there was raptor kinda alien was standing. A tail, pair of wheels on his feet and a sharp head. "XLR8." Ben shouted.

Barbara was just stunned and looking at Ben in awe. He completely changed but he was also the same person. But she shook her confusion quickly cause people might need help. "And how does this will get us there in a blink?" She asked.

Ben just smirked. He grabbed Batgirl and ran off to the location. And like he said, in a blink they were there. Barbara just stood still and adjust her new surroundings.

"So this is how Flash feels." Batgirl said as she get herself together. Super speed can mess up people. After a flash of green, Ben was back to normal. She turned her gaze to Ben and smiled. "Gotta admit that was neat."

"Thanks but let's focus." Ben said and start to look around. Barbara nodded in agreement and look around as well. They were in a dusted street. Buildings around were damaged but not enough damaged to took them down.

"Looks like a bomb jomb. Natural explosion would've cause more damage to area." Barbara guessed. She was certain on the material and how explosion was caused but didn't know who did it or why they did it.

"Probably wanted some attract some attention. You know like bait." Ben said as if he read her mind. Something was fishy here and he was determined to find out. His world or not, no one is gonna cause problem on his watch.

"Smart boy, you should keep him around red." A crispy and deep voice said. The duo turned their attention to source of the voice. A man or a reptile man was standing there with a murderous look in his eyes. While Barbara seemed worried, Ben wasn't even fazed.

"Wow a crocodile man. I've seen weirder but you are weird for sure. So you planted a bomb because you wanted to get Batman's attention." Ben said causally, like it was super normal daily thing.

A smirk came to Croc's face. It was creepy dude. "First of all kid, name's Killer Croc and yeah I wanted get Batman but you two will be enough too."

Barbara took a defensive stand and pulled some explosive batarangs from her yellow belt. Ben just stood and waited for him to first move.

"Oh you wish you got Batman cause when I'm done with you, it won't be pretty." Ben said. Course this didn't scare Croc because Ben's human for wasn't scary and Croc saw himself as a tough and strong person.

He just laughed. "What are you gonna do kid? Hit me with pancakes?" He kept laughing but a flash of green light stopped him in his tracks and when he looked back, Croc's jaw was on the floor because boy was and in his place was.

"Four Arms."

Batmobile was racing through streets and trying to spot any sign of any type of crime. Since this is Gotham city, it wouldn't be too hard to find it. So far Batman had to deal with two robberies, three rape attempts, six drug deal. No one knows why is crime so high in Gotham city.

"Sir there has been an explosion in Batgirl and Master Benjamin's patrol area. Maybe you would like to go?" Alfred informed him through commlink in the car.

Batman merely shooked his head. "Let Ben and Barbara handle it. I'm curious to see Ben's abilities." He answered while keep driving and doing his patrol.

A little smirk reached to Alfred's face. "As you wish Master Bruce." And then Alfred ended the call.

A green blur just crashed into a wall. And now we can see it was Killer Croc himself. He looked real dizy. Like he was having the fight of his life, which he probably was.

"C'mon dude. You are my first villian here and I'm not imperresed." A deep and strong voice called out. It was Four Arms himself.

Killer Croc got up slowly, still feeling the damage he took from Ben. Croc didn't except this at all. He thought he would face Batman or one of his lackey. But then some random ass kid turned into some kinda four armed creature and now kicking his back. But Croc doesn't plan to let him have that satisfaction. "You think you're so tough ha. I'll rip you apart and eat your bones." Croc said while snarling dangerously. Trying intimate Ben.

Instead, Ben merely chuckled as if he was facing some child. "Yeah? then why I'm one the one is not shaking?" He said as he prepared his fist for fight. Barbara was watching the fight from a few meters away and she was ready to jump in, just in case but from the looks of it Ben doesn't need help. Killer Croc roared and jumped towards Ben but hero was quick to dodge. He simply sidestepped and let Croc hit the ground instead. Four Arms brought his upper arms upon his head and hit Croc's back, crushing him into ground more. Also creating a small crater along the way. Although Ben didn't stop, He lifted the Croc and bring his back to his knee, bring Croc's body great pain. Of course it wasn't enough to break his back or something. Ben wanted to beat him, not kill him or mortally wound him. Then he threw Croc to other side of street.

"Damn Benji, you messed him up." Barbara said as she came next to Ben. She was pretty impressed by what she just saw. Didn't except to Ben fight this well and calm.

Ben raised an eyebrow while smirking. "He's not that much of a threat." He said. While Croc was a hard opponent to Batman and his team, to Ben he was not that much strong though. He faced way worse. Barbara was about to respond his banter but she saw Croc was getting up, despite the beating he just received. She quickly drew two batarangs with little red dot in the middle and threw them to Croc's feet. Batarangs got stuck on ground and started to beep. After two or three seconds, batarangs explode and finally cause Croc to go to sleep.

"And final blow goes to prettiest superhero ever." Ben remarked with a smirk, now transformed back. His focused back to Croc, mask on Barbara's face covered her blush of course. Ben said it as a joke but regardless, there was some sincere in his voice.

"So what should we do with him? Not like normal police is gonna be able to keep him contained." Ben asked to his new partner. Croc was a little much for the police to be honest.

"Arkham's guards can handle him. I made the necessary calls and they will be here in a short time." Barbara answered. Plus she enjoyed the fight too. Ben looked bored though. "Not enough exciting for yah?" she asked with a smirk.

"Yeah, no offence but this guy was kinda joke." Ben said. But decided to let go since his luck known to be crazy. We don't wanna an alien warlord suddenly appear and start shooting people.

Barbara chuckled. "To you Mr.OP alien but to us he's a pain in the ass."

"I never said he wasn't." Ben simply said and walked towards Croc's fainted figure. Barbara followed his suit with a bright smile on her face. One certain thing she knew was that working with Ben gonna be neat.