"So tell me, how does this thing work?" Saitama asked as he held up the small, metallic cube.
"Gosh, Puddin', I couldn't tell ya," Harley Quinn replied with a shrug. "I might be a doctor, but this dimensional travel stuff is beyond me."
"No, I was talking to her," the bald clown said as he pointed to the trembling Starlabs scientist who was on the floor before them, begging for her life.
After defeating the Flash, the pair had made their way to the facility's lower levels where they found the laboratory's trans dimensional devices, the likes of which the Joker had previously stolen and used to enter Saitama's world over a week ago. After storming the lab, the duo annihilated most of the personnel before stealing one of the coveted cubes.
"P-please don't hurt me!" the scientist begged as she nodded up towards the device. "All you need to do is hold that button on the side, and then think of the place that you want to travel to. We've numbered many dimensions, so you could think of the alphanumeric code, or you could visualize the dimension in your head."
"That's it? Hah, a moron could do this!" the caped baldy exclaimed as he took hold of Harley's shoulder while pressing the button down on the cube. "Okay, let's see. I'm from a world…with lots of monsters and lots of heroes!"
Closing his eyes as he attempted to visualize his home dimension, the pair became surrounded in blue light as a boom tube opened beneath them. Harley clung to the bald clown as she screamed loudly while they fell into the interdimensional tunnel, where the trembling scientist watched as they vanished from sight before letting out a sigh of relief.
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"Déjà vu!" Saitama laughed as the blue light began to fade out to reveal that the two had spawned in an alleyway.
"That wasn't so bad, it was kind of like a waterslide," Harley smiled as she skipped out onto a street corner. "Wow, is this place really a different dimension?"
Joining the jester girl along the side of a busy street, Saitama looked around to see that they were indeed within a sprawling city, although nothing about it looked familiar.
"Heh, that's a good sign," the bald clown smirked as he spotted a ramen stand at one of the street corners, where he then strolled up to the elderly vendor and rang the little service bell. "Hey gramps, what city is this?"
"Ah, heroes eh? Are you from out of town or something?" the man asked, looking towards Harley Quinn in particular. "You're in Musutafu, Japan, but I'm sure you at least knew the country."
"Musutawhat? Oh great, this isn't my world!" Saitama groaned in annoyance as he backed away from the stand. "So then where the hell are we?"
"We got a Japan in my world, maybe that cube thing just teleported us across the planet?" Harley suggested with a shrug.
Before the duo could say another word, a person with the head of a grey tabby cat nonchalantly strolled past, capturing the attention of both of them.
"What in the world is wrong with your face?" Saitama asked bluntly as he skipped ahead to confront the feline-headed man, who was dressed in a business suit. "HAHAHA is that real? Or is that just a mask?"
"Its so cute! Oh my gawd, his eyes are blinking and everything, I think it's real!" the jester girl exclaimed as she got right in the man's face.
"T-this is just my quirk, I didn't ask to be born this way!" the guy stammered, before shuffling around the bald clown and hurrying his way down the sidewalk.
"Quirk? I don't know what that means, but some of the folks here are pretty weird looking," Saitama continued, watching the crowds of people move through the bustling city. Many of them had odd physical characteristics, ranging from strange-shaped faces, to have their heads or a portion of their bodies resemble an animal's.
"Dude at the noodle place thought that we were heroes, so if there are heroes here, then I guess there's gotta be villains too, right?" Harley added.
Thinking for a moment, the clown-faced man snapped one of his red-gloved hands as a devious idea popped into his shiny head.
"I've got it! Lets draw the suckers out!" Saitama exclaimed. "I'll do something to draw out the heroes, and then some villains will totally try to approach me. Then, I flip the script, and ask if they want to join MY operation back on your world! Its genius!"
"Good thinking, Puddin', but what are you going to do attract heroes?" Harley asked as she pulled up on her skin-tight, red and black outfit.
"Hehehehe easy, we just need to do something that'll force the heroes to respond," the bald clown snickered cruelly, before bending his knees as he prepared to jump. "Such as a civilian-killing disaster, for instance."
Leaping hundreds of feet off the ground, Saitama quickly picked out the tallest building in the area and aimed for it. Throwing his fist in a regular punch, a horrible crashing sound of bent metal, shattering glass, and crumbling stone rang out across the city as a nearby apartment complex and several similar buildings behind it exploded into dust.
The screaming of nearby civilians could already be heard as the caped villain landed back on the ground, smirking at the rising smoke from the structures that he'd just demolished.
"Well, that's one way to do it," Harley snorted as she swung her hammer over her shoulder while the sirens of emergency vehicles sped down the street close to them. "I wonder how long we gotta wait?"
Standing there in silence for a few moments, Saitama twiddled his thumbs awkwardly against the ambient sounds of sirens, screams, and eventually, a helicopter. Then, something approached.
"Hmmm, that wasn't long at all," the bald clown grinned as he sensed something large and fast hurtling in his direction. "Harley, you might wanna stand back somewhere again."
"I can hold my own, Puddin, you gotta stop underestimating me!" the jester girl complained, only for a massive figure to impact the street a second later, the shockwave of which blew the young woman against the brick wall of a nearby building.
"HA HA HA, do not worry citizens, everything is going to be okay!" A towering man with blonde hair that was stylized in a peculiar fashion around his temples exclaimed as he rested his incredibly muscular arms on his hips. "Because I am here!"
His chiseled face breaking out into a large, toothy smile, the man wore a costume that was adorned with red, blue, and yellow. Nearby people on the street began to cheer excitedly at the figure's appearance.
"Whoa there, Superman should sue you for stealing his colors!" Saitama laughed excitedly. "Are you a hero, by any chance?"
"I don't know where you're from, villain, but your senseless damage to this city stops here!" the man exclaimed, taking two large, thunderous footsteps towards the bald clown. "My name is All Might, and I'm the number one hero in the country, if that answers your question."