It was a... not so bright and sunny day around Bowser's Castle. The two new employees, Wario and Waluigi were sweeping the constantly dusty halls.
"Why do we have to do this again?" Wario asked, feeling his arms starting to ache.
"Because someone decided to buy a centuries worth of Yoshi Cookies from the girl scouts." Waluigi pointed out.
"What's your point?" Wario asked, chewing a cookie that was in his mouth.
"Oh forget it." Waluigi facepalmed "I too am getting tired of this filthy, stupid job."
"Why don't we just quit and get a job in the Mushroom Kingdom?"
"Do you remember what happened last we had a job in the Mushroom Kingdom?"
"Oh yeah." Wario thought.
2 weeks earlier...
"AHHH! "
"HELP ME!"
"GET ME OUT OF HERE! AHHH!"
"THE PAIN! OH, THE HUMANITY!"
"MY BABY!"
Now...
"Nevermind. " Wario said, going back to sweeping the floors.
"Grr!" Waluigi fumed "I've had it! I'm through sweeping floors for a one measly coin a year!"
Waluigi was so angry he snapped the broom right over his knee.
"Hey!" a koopa guard said walking up to Waluigi "That's coming out of your paycheck pal!"
"Forget my paycheck!" Waluigi shouted, throwing the broken broom at the koopa "WE... quit."
"We do?" Wario asked.
"We do." Waluigi nodded "Let's go."
And so Waluigi pushed Wario out of the castle and closed the doors behind them.
"Waluigi? What are supposed to do now?" Wario asked, scratching his head, still being pushed by Waluigi.
"Why, we'll just have an adventure... like those stupid Mario brothers."
"That's a great idea!" Wario cheered "Where do we start?!"
"Exactly where all the Mario brothers start their adventures..."
(Insert first level of Super Mario Bros. here with Wario and Waluigi replacing Mario and Luigi)
Wario's and Waluigi's adventure finally begins.