Disclaimer: I do not own Zatch Bell, The Duke of Death and His Maid, Urusei Yatsura and SMG4

Chapter 1

"Where in the actual heck are we?" Suzume asked.

"We're standing in front of Princess Peach's castle," Walter answered, staring at the ironic castle in surprise. "but it's impossible to be here. The castle is from Super Mario 64."

"Wow, I did not expect you to be a gaming type."

"Meh. Viola is the gaming type. She makes me watch her while she plays Mario 64 and other games."

"I don't mean to cut off y'all chat, but we got a problem." Ataru actually looked frightened. "How in the hell did we get here?! Don't tell me we've died and isekaied into the Mario 64 universe!

"What's an Isekai?" Walter looked at Suzume, confused by the unfamiliar Japanese word.

"It means otherworld or another world. It is a popular light novel genre." Suzume explained, being a light novel reader. "I prefer Shoujo Isekai through. The Shounen ones are too overrated, and the protagonist in a Shounen harem is boring and plain as hell."

"Again, what's a Shoujo and Shounen?"

"Shoujo is for the female readers, and shounen is for the male readers. But don't get the wrong idea. Some female readers read shounen, and some male readers read shoujo."

"I'm hungry. Do you got any food?" A curious voice asked.

"Wait a second, that voice sounds familiar." Ataru spun around and faced Mario with crossed eyes. "What the hell?!"

"Wait, don't tell me we're-" Walter started.

"in the SMG4 universe?!" Suzume finished for him.

"Oooh, you're friends of SMG4?!" SMG4 Mario smiled at the guests. "He's inside the castle!"

"So, you three came from a different world?" SMG4 asked.

"Obviously." Suzume sighed. "How do we get back?"

"You must search for the ice wings!" SMG2 claimed.

"And these ice wings will get us home?" Walter inquired. "Where do we find them?"

"Well," SMG1 rubbed his chin in thought. "We gotta do research."

"Oh great. Why bother suggesting the ice wings if you don't know where it is." Ataru groaned, annoyed.

"It looks like we'll be stuck in this castle for a while." Suzume sighed. She didn't sound too pleased with the idea.

"Well, I'd rather crash here than live with my overbearing mother," Walter grumbled. "Sucks to be Viktor and Viola through. I wonder if they're searching for me."

"Same with my mother and friends back in my motherland."

"Hmph. My parents gives no shit about me. I bet they're happy that I am gone." Ataru said bitterly. "And I can be away from Mendo and other annoying classmates of mine for a while."

"I guess we all need a break from our daily boring lives," Suzume added.

"Why there's lava in here?!" Walter shouted, standing on a sofa.

"It's probably nothing." A skeleton Mario shook his head and went back to fishing.

"How in the hell are you even still alive?!" Walter gawked at Mario in shock.

"I don't wanna die twice!" Ataru was hanging onto a telephone pole that somehow got inside Princess Peach's castle.

"MARIO!" SMG4 emerged from the second floor. "What the hell did you do?!"

"He summoned his devil friend to fill the castle with lava!" Suzume yelled at SMG4 across the room, hanging onto a large chandelier for dear life. "I wish I was a summoner so I can summon Shiva!"

"Wait, you're also a Final Fantasy fan?!" Walter turned his attention to Suzume.

"I forgot to tell you!"

"WELL, SOMEONE DO SOMETHING ABOUT THE LAVA! The goddamn pole here is melting!" Ataru exclaimed.

"Yeah, Mario! Call your friend back and return the room back to normal!" Suzume's eyes stretched to the skeleton Mario. "NOW." Suzume used her stretching eyes to slap Mario. "OUCH! My eyes hurt now!"

"...Now I've seen everything." Walter had a blank expression.

"Dude! What the hell happened to your neck?!" Ataru called out in horror.

"You ask me, Ataru." Walter's head was now in front of Ataru. His neck had stretched from the sofa.

"I can do the same too!" Ataru's head became larger.

"This is the SMG4 universe, all right! Our bodies can be flexible!" Suzume's eyes went back to normal. "Now, is there a way to summon Shiva?! We're melting in here!"

Walter had a horrified expression when he spotted a naked Mario on a massive plate of spaghetti.

"I'm out." Walter leaves Mario alone and goes upstairs. Suzume, a Luigi doll, and Boopkins played a YuGiOh card game on the floor. "What are you guys doing?"

"Hey, Walter! Do you want to play the game with us?!" Boopkins asked, excited.

"I know you are thinking of a way to defeat your firstborn brother once you return to our world." Suzume's eyes had stretched out to Walter in a fishy matter.

"Now, you can read minds?!"

"Nope. I'm just guessing." Suzume giggled. "I'll be watching you, Walter. Always watching you." Suzume's eyes went back to their usual length.

"...Anyway, where is Ataru?"

"Who knows. Ataru probably went to Toad Town to hit on female toads."

"But Toad Town is in Paper Mario."

"Welcome to the SMG4 universe where the locations are randomized."

Meanwhile, Ataru was indeed flirting with the female Toads.

"Hey, baby! Got a phone number?!" Ataru grinned flirtatiously.

"Eww! Begone, weirdo human!" Toadette smacked Ataru in the face with a hammer."

"AHHHHHHH!" Ataru flew off and went inside a shy guy's toybox. The Anti Guy stood before him, and he was pissed off. "Oops. Hello?" Ataru smiled weakly, having an amused expression.

"STINKY HUMAN!" The shy guy beat Ataru up.

Back to the Princess Peach castle, Suzume and Walter played the YuGiOh card game while Boopkins and the Luigi doll watched with interest.

"Yeah, Ataru is getting his ass kicked." Walter placed a card down.

"And I'm about to summon the Blue-Eyes White Dragon on your Red-Eyes Black Dragon." Suzume grinned.

"Damn it!" Walter ruffled his hair in frustration. "I can't believe you beat me!"

"You're pretty good, Suzu!" Boopkins praised.

The next day.

"Good morning, Walter, Ataru. How was your sleep?" Suzume yawned.

"Sleeping on a sofa isn't my ideal," Walter answered.

"Hey! You kicked me off the sofa, dude!" Ataru exclaimed at Walter, upset.

"It's because there wasn't enough room for two guys." Walter countered back, annoyed. Then, he coughed blood. "I SAID MY OWN FORBIDDEN WORD!"

"Geez, Walter. You need to see a doctor." Suzume breathed, having her hands on her hips. "Anyway, we should visit SMG1 and SMG2."

"Damn, right. There's better be a location for those ice wings." Ataru added.

And soon, our friends from the other world would discover they weren't the only ones who got isekai to the SMG4 Universe.

Meanwhile, in the Bob-omb Battlefield...

"HELP ME!" Viktor screamed as he was being chased by a chain chomp.

"I will stop you!" Mendo jumped midair and struck the chain chomp with his katana, but the katana broke in half. "WHAT THE?!"

The chain chomp turned around and smirked in amusement at Mendo before chasing him.

"NOOOOOOOOOOO!" Mendo ran for his life.

"Where the heck did we end up at?" Viola wondered, helping Viktor to his feet.

"No idea, Viola," Viktor answered, confused as his sister.