This is a crossover I've been meaning to do for a while! I love Konosuba and Smash bros. I always thought they would go well together for some reason. This takes place after the Konosuba movie so spoilers if you haven't watched the anime or the movie.

Anyways no time for talking, enjoy!

It was a completely normal day at the Smash Manor. Everyone was either relaxing or doing something else.

The weather was very nice and warm out. Some were outside talking, swimming, as the children played sports or played tag.

"Hey a Luigi?" Mario asked as he was outside of the manor having lunch with his brother. As well as Marth and Roy,

"Yeah a Mario?" Luigi asked taking a bite of his sandwich.

"Ever a wonder that something might a happen?" Mario asked twirling his fork in his spaghetti.

"What do you mean bro?" Luigi asked raising an eyebrow.

"There's a been so many a weird guests as of a late. First we had those four girls. Ruby, Weiss, Blake, and a Yang. Then we had a that goddess and her a Famillia. Now a what? We've had a so many weird guests that who knows what could happen next!"

"Mario you a better be a careful. Nothing bad ever a comes out of theses arrivals." Luigi said.

"You never a know Luigi! There could be a some demon monster thing! Or an evil a dragon appearing!" Mario said.

Ridley was walking by when he heard what Mario said. The Space Pirate just snorted and walked away.

"Mario, I know we've had some strange guests for the past weeks and months. But you have nothing to worry about." Marth said. "They've all been friendly people, I think nothing bad will happen." As he took a bite of his salad and chewed it calmly and thoughtfully.

"Yeah guys!" Roy said snacking on a drumstick. "We…mph…gmot nothing to worry a bhout." Roy had meat in his mouth so it was hard to understand some of the words he was saying.

"Yeah. I a guess your all a right. We'll a be okay." Mario nodded. As he went back to eating his spaghetti and meatballs.

Yep, everything was completely normal. No crazy antics, no competitions, no guest appearances or anything.

Completely normal day.

……….

Or is it?!

In some distant land far far away. Was a city in a world of fantasy. A city called Axel, where many adventurers of many kinds lived to defend people from threats or monsters.

And there is a mansion in Axel that houses a group of four adventurers. One is a kind of perverted young man with brown hair and a green mantle with a white shirt, leather boots. Sort of like a tunic. His name is Kazuma Sato.

Another is a younger and more lively mage, wearing red and black with bandages wrapped around one of her legs. Who wears a black cloak and a black wizard hat. As well as a staff. And a member of the Crimson Demon clan. It is none other than Megumin.

Another was a blue haired arch priest who was originally a goddess before she was brought to this world. Who is mostly called useless and mostly does party tricks with her magic. The name of this arch priest is Aqua.

And last is a crusader. An aroused woman who some people would call perverted. She wears armor and barely hits anything in combat but her heart and will is strong. She has blonde hair and wears it as a ponytail. Her name was Darkness.

"WAAAAAHHHH! Why do we have another debt Kazuma?!"

Also Aqua, was very whiny.

In the mansion Aqua was on her knees as she had her hands on Kazuma. Who was just standing there while Aqua was whining and shaking him.

With Megumin and Darkness standing near the two. Megumin sitting on the couch while she was petting Chomusuke. Who was purring.

Kazuma looked like he was about to slap Aqua on her face. As he sighed.

"Well maybe it's because you spent a lot of our money on booze!" Kazuma exclaimed throwing his hands up. "And that Megumin blew up that one castle!"

"Hey! You shouldn't have underestimated the awesome power of explosion magic!" The Crimson Demon exclaimed.

"Meow!" Chomusuke meowed with excitement.

"You know that Megumin was just trying to protect Axel." Darkness defended her party member and friend. "Besides, if whatever was in that castle let loose…."

"Oh no don't you dare!" Kazuma thought as he knew how Darkness was about to act.

At that moment Darkness put her arms out and blushed, with a big perverted smile on her face. "It could've hit people really hard!! So damn hard in fact!! It could've hit me!!!"

"Maybe it should've hit you on the head so you'd stop being a creep!" Kazuma mumbled to herself.

"What did you say Kazuma?!" Darkness asked him.

"Wait you heard that?!" Kazuma exclaimed looking at the Crusader. "Nevermind, anyways I think it's only fair that Aqua pays for the damages."

That came as a huge surprise to the whiny bit-sorry, goddess. As she kept whiny and got down on her knees. Grabbing Kazuma by his pants and shaking him.

"I don't wanna pay for it!! I don't wanna I don't wanna!!" Aqua continued to cry and whine. "You pay for it Kazuma! You pay for it!"

Kazuma pushed the whiny goddess of of him and complained. "Oh hell no! You're not getting off like that! Your gonna pay for the damages wether you like it or not!"

"But Kazumaaaaa!" Aqua whined again.

That's when suddenly, a knock on the door. As the party turned their attention to that knock.

"Who's that?" Aqua asked.

"I will go check." Darkness stated as she walked to go check who was at the door.

"If it's an enemy I'll blow them up!" Megumin exclaimed as he pointed her staff in the air.

"Not unless you want to pay for our mansion!" Kazuma exclaimed as he glared at her.

Megumin's smile turned upside down, as she pointed her staff down and whistled innocently.

"I wonder who's at the door." Kazuma thought. "If it's something about our debt or if it's one of the other generals of the Devil King then Aqua gets to deal with it."

Aqua fell to the ground with a face of despair. "Why do I have to fight it?! Can't we all fight it together?! Please?!"

"Come on Kazuma, you know Aqua probably can't kill a general on her own." Megumin sighed. Didn't bring up the power of explosion at that time.

"Your right, because all she can do is party tricks." Kazuma then grinned devilishly at Aqua. Who cowered in fear.

That's when Darkness came running into the room with something in her hands. "Kazuma Kazuma!"

"Yes I'm Kazuma." Kazuma said as he turned towards her.

"There was an invitation for you at the door!" Darkness exclaimed. As she held out the letter to him.

Kazuma glanced down as he took the letter from the crusader and looked at it.

As soon as Kazuma looked at the envelope seal. His eyes widened.

"No way!!!!!!" Kazuma exclaimed looking down at the envelope. Which surprised the three girls.

The envelope had a red seal. A red circle, with a cross in it.

It was an invitation to Smash. But Kazuma was the only person in Axel who knew what it meant. Given his previous life.

"No way!!! This is totally awesome!!!"

(Play Konosuba season 2 opening, Tomorrow. With Smash Characters and Konosuba characters.)

Axel…..

"No way!! This is insane!" Kazuma exclaimed as the other three girls were puzzled.

"What is it Kazuma?" Megumin asked.

"You haven't even opened it yet so why are you screaming?!" Aqua exclaimed as she pointed at him.

"Aqua look at this!" Kazuma exclaimed as he showed her the stamp of the letter. Aqua looked at the stamp and analyzed it closely. As she squinted her eyes and examined it as best as she could.

Aqua nodded. "Mm-hm. Oh! I know what it means!!" Aqua exclaimed.

"You do?!" Kazuma asked as he smiled.

"Wait." Aqua looked at the stamp again and scratched her head. "Actually no, I don't." That caused Kazuma and the others to fall on the ground in surprise as Kazuma sighed. "What does it mean?"

"Useless goddess." Kazuma thought as he showed it to her again. "Look, this is what it means."

Kazuma then brought Aqua to a corner of the room. As the two huddled up and Kazuma whispered

"Back in my world, there was a game. It was one of the only other games I played aside from RPG's or MMO's, it was called Super Smash Bros." Kazuma explained as Aqua nodded.

"Oh yeah! I remember that game!" Aqua smiled. "Eris always kicked my butt at it!"

"Right, so any time they added new characters, they gave them this invitation." Kazuma stated as he moved the envelope right in front of Aqua's face. "So then that means, I got an invite to Smash!"

"Woah woah woah hold on Kazuma!" Aqua put her hands out. "That's just a game it's not real!"

Kazuma stared at Aqua. "Oh and this fantasy world is?"

"That's different!" Aqua claimed as she stomped her foot on the ground.

"Sure it is Aqua, you useless goddess." Kazuma nodded. "Anyways, when I was still alive, Smash had its fourth installment out. They had two more characters to add before they ended DLC. Some Fire Emblem dude and Bayonetta. And now if my math is right, it's 2021. So I gotta no what's happened!"

Kazuma then began to open up the envelope.

"Wait Kazuma! What if it's a trap?" Aqua asked as she grabbed his hands. "What if it's from Whiz?!"

"Come on, Whiz wouldn't harm us." Kazuma rolled his eyes as he continued to open the envelope. "If anything it's another one of the Devil King's generals."

"THEN DON'T OPEN IT!!!!" Aqua cried as she shook him.

"What's the matter Aqua?! Is Kazuma forcing you to do horrible acts?!" Darkness asked as she blushed. "Oh the horror! Why can it not be me?!" She then smiled as she grabbed her arms and tried to restrain herself.

"Too bad Aqua, I ain't listening to you." Kazuma shook his head as he smirked.

"But why Kazuma? What if it's dangerous?!" Aqua asked as he shook him.

"Because I already opened it."

Everyone looked at the envelope, and before they knew it, the letter was glowing blue, and so were the four idiots, as things started to shake and the four looked in all different directions.

"Wh-what's going on?! Are we gonna die?!" Aqua exclaimed as she got on the ground and covered her head with her hands.

"Has the Devil King risen to perform acts because of his horrible desires?!" Darkness exclaimed. "What are we going to do Kazuma?!"

"I don't know."

"This power is incredible! More than my explosion magic!!"

"This isn't really that bad." Kazuma yawned.

"Oh god we're gonna die we're gonna die! Eris help me!!!"

"Wait Aqua I thought you…"

"Take Kazuma not me! Take him!" Aqua then grabbed Kazuma as she started to shake him and cry.

"Hey! What the fu-"

And suddenly, the four disappeared. As well as Chomusuke, as the envelope dangled onto the ground. Without a trace of the four or the letter that was inside the invitation.

That's part 1! Other parts will come!!