It was a cloudy day in late July. A mansion nestled outside of the city limits of Brooklyn, New York, was preparing for a change.

The owner of the mansion was an incredibly tall, beefy man covered in tattoos with a fiery red mohawk, thick eyebrows, stubble dotted on his chin, and reddish-brown eyes. He had on a black wife beater, a heavy black leather jacket, a spiked collar around his tattooed neck, and ripped denim jeans. He smelled heavily of musk and sweat. Bowser Koopa was his name. He had a very tired, disgruntled look on his face as he walked his halls.

"Why does that bitch have to drop those fucks off sooo early?!", Bowser mumbled in his harsh, deep voice as he entered the spacious kitchen, rubbing his face as pressed the coffee maker on and roughly slid a mug underneath it. "10 a.m., honestly? She must be trying to get back at me…fuuuucck."

Bowser proceeded to load his coffee with large spoonfuls of sugar. He sat down at his red colored personal dining chair and vigorously stirred his coffee as he waited anxiously for his servant to finish making him his sausage and eggs at the other end of the kitchen. A few minutes later, a porcelain plate containing 2 side up eggs and a few large sausages, along with a fork, was set down in front of him.

"I'm sorry for the wait, my lord!", said the servant shakily with fear in his voice. "I-I promise!"

"You better be, pleb.", Bowser said as he took a swig of his coffee and pierced a sausage with his fork. "Now, you'll need to make dozens of pancakes for the teens when they arrive. Get on it!"

"Y-yes! Right away!", the servant said as he rushed to gather all of the necessary ingredients and utensils.

It was around 9:30 a.m. Cecile is dropping off Roy, Wendy, and Larry at 10 o'clock sharp. Carmen is dropping off Morton around noon. Who honestly knows when Lemmy and Iggy are getting dropped off by their uncle Josh. Then around 1 p.m. he'll have to pick up Ludwig from the airport.

"Daaaaaaaaaddy!", a high pitched adolescent voice echoed throughout the manor, accompanied by the thumps of little feet running through the halls in a rush.

It was the owner's 5 year old son, Bowser Koopa Junior (most commonly referred to as Junior). Just like his father, he has fiery red hair and reddish-brown eyes. He's on the stocky side, with chubby cheeks and a devious grin. He's a very bratty, spoiled child that throws tantrums if he doesn't get what he wants. Currently he has on a pair of white shorts, a red baggy t-shirt and some white socks. Junior is always wearing a grey headband around his head, making his hair spike up slightly. As well as a white handkerchief tied around his neck; he drew a grinning mouth on it with sharp teeth and messily colored it in with markers. He likes to move it around his mouth when he's either upset or being devious.

"I want Sugar Frosties!", Junior exclaimed as he jumped into his orange colored personal dining chair seated next to his dad, throwing his arms into the air in a fit. "NOW!"

The servant, in the middle of ladling some of the pancake batter onto a greased skillet, frantically dropped the batter covered ladle onto the kitchen floor and rushed to grab the box of Sugar Frosties out of the pantry, a bowl from the cupboard, a spoon from the drawer, and the jug of milk from the fridge. Basically running with all 4 items to the other end of the kitchen, almost accidently dropping the milk jug, he set the items in front of Junior. Quickly, he opened the box of cereal and dumped a large amount into the bowl, then sealed the box. He then proceeded to pour lots of milk atop the cereal mound, and handed the spoon to the young boy.

"E-e-enjoy..!", the servant said almost horrified, Bowser giving him a glare from across the table. "…and have a wonderful day!"

"Mmmm~", Junior murmured as he ate a spoonful of his cereal. "Thank you Mr. Servant~"

"Y-yes…", the servant sighed with relief, and walked back to the other end of the kitchen to clean up the mess he made when he dropped the ladle.

"Junior…" Bowser looked at his son, who was currently downing the bowl of cereal. "I need to tell you something."

"Huh? Yes daddy?" Junior asked his dad, confused and curiously.

"Your 7 older cousins will be staying with us for a while." Bowser said. "They used to live with me before you were born, and they considered me their father for the first half of their lives… It's complicated to explain, but I'll tell you everything when you're older. None of them know you exist, so it'll be a surprise for them when they see you. The oldest is named Ludwig, and he's currently flying here from Austria. He's 17 and going into his senior year of high school. The youngest is named Larry, around 14, and is going into 9th grade. 3 of them will be coming over in around 15 minu-"

Bowser was interrupted mid-sentence as he heard the doorbell ring. He got up from his seat and walked up to his massive front door entrance. He peered into the peephole of his door, and saw his brother's ex-girlfriend standing at the door, looking through her phone. In the background were 2 cars parked in his semi-circle driveway, with 3 teens rummaging through them.

'Shit, Cecile is already here.' Bowser thought as he opened the door.

"Hi!", the thin blonde women looked up from her phone and held out her hand for him to shake. She had a grin plastered onto her face, huge blue eyes, pink lipstick, a pair of sunglasses atop her head, and long, wavy platinum blonde hair. She was wearing a women's business suit, heels, and smelled heavily of perfume. Her over enthusiasm made Bowser feel sick. "Remember me, Cecile? It's really been a while, hasn't it. I'm sure the kids will have a great time catching up with their uncle and other siblings this school year! Promise me you'll keep them out of trouble."

"Yeah, I will." Bowser said sarcastically, smirking, shaking her small hand.

"I'll go help the kids get all of their stuff out of the cars!" Cecile exclaimed as she rushed back to one of the cars, helping out the girl grab something.

Bowser left the door open as he walked back into the kitchen, Junior was peeping from the side of the kitchen entrance. Junior looked anxious to meet new people.

"Junior, I'm going to go upstairs for a while. I'll be back." Bowser sighed, and turned around into the front of the house, and proceeded up the long, wide staircase.

Junior ran up to the front door, and peered outside at the cars and people. There was a larger blue car, and a smaller purple car. A short, strawberry blonde girl with a large pink bow in her hair, wearing a pink and red dress with pink heels, was fishing out bags from the trunk of the blue. The platinum blonde older woman was getting out a suitcase from the backseats. The purple car had a smaller, younger boy with an intricate blue hair style that was spikey in the back was pulling out a suitcase from the trunk. Then a much larger, taller guy wearing aviator sunglasses, a pink beanie, and a leather jacket was getting a duffel bag from the passenger seat.

'This is so exciting!', Junior thought as he looked away and jumped up and down with excitement.

Hey guys! Author here. Here's the first chapter of my Mario universe AU. I'll be uploading a new chapter once or twice a week. I've had this story idea in my head for over a year. I'll upload bios of minor characters, such as the the Koopalings' mothers, that I've created to help the story flow better after chapter 2 or 3 once I've introduced most/all of them. Hope you've enjoyed the 1st chapter! Chapter 2 should be uploaded in a few days. Reviews and constructive criticism are all accepted. Thank you for reading!