Disclaimer: I do not own any of the material appearing in this story.

BGM: Overworld (Super Mario World)

"Welcome to the Donut Plains." Sarge read a sign as soon as they got into the next area.

"Wow, you were named after this place!" Caboose told Donut.

"Cool… and totally weird." Donut said.

"Oh come on, I doubt he was named after a place stupidly called Donut Plains." Church said.

"You just gotta believe, Church!" Donut said.

"Whatever."

"I wonder if we'll find Peach here." Ruby wondered.

"I doubt it, but it could be a possibility." Mario said.

"If only it were that easy." Luigi rolled his eyes as they went into the first area of Donut Plains.

World 2-1: I Believe I can fly!

As they walked forward, they all spotted some flying Koopas, or Super Koopas, if you will. "Turtles that can fly?!" Grif asked.

"You should see Koopas with wings." Luigi chuckled.

"Oh, so that's what they're called." Ruby said as Mario hopped off of Yoshi as he ran forward and jumped on a Super Koopa, grabbing the Cape Feather that fell and donned that signature yellow cape. "Oooh, that feather!"

"You've seen it?" Mario asked.

"Yeah, when we came to rescue you!" Ruby said. "I grabbed that feather and all of a sudden, I could fly!"

"They're called Cape Feathers and anyone can wear it and fly with practice." Mario said, and glanced at Jaune. "Well, almost anyone…"

"…Do I even wanna know?" Blake asked.

"Let's just say when I tried to fly… it gave me a super tight atomic wedgie that had to be surgically removed…" Jaune blushed in embarrassment. "It happened when you guys were traveling with Pit."

"Aww, we missed that?" Yang pouted.

"Flying with a cape… now I've heard everything. Next thing you tell me is that you can actually do it!" Church said as Mario smirked as he took a running start and flew up in the air, and then gently floated down.

"Super Mario!" Caboose grinned.

"…Shut. Up. Caboose." Church growled.

"Anyone can do it, eh?" Sarge rubbed his chin in thought. "That's good to know…" He mused, watching Ruby take down another Super Koopa and grabbing the Super Feather.

"Ah, it's good to have it back!" Ruby giggled as they walked forward a little more as they destroyed a Volcano Lotus and some Charging Chucks throwing baseballs at them, but overall, it wasn't too difficult as Jaune took down a Super Koopa and then took the Cape Feather.

"Alright, time to do this properly!" Jaune said as he attempted to fly… and they all heard a gigantic rip.

"Oh my!" Pyrrha said, blushing at the sight while Ruby burst out laughing and fell to the ground.

"Hey buddy! You forgot something!" Sun called out.

"Huh?" Jaune looked down… to see that his pants had somehow ripped off… most likely because he stepped on a twig that caught his pant leg without his knowledge. "AAAAH!"

"I didn't need to see that…" Nyx said.

"Oh, I've been there…" Luigi said.

"Wasn't it with a Piranha Plant, though…?" Mario wondered.

"Yeah…" It was bad enough it was in front of Daisy too… He thought.

"Lookin' hot!" Sister called out as Jaune came down, grabbed his jeans and hid behind a bush to put them back on.

"Better him than me." Grif said.

"Sorry you had to see that…" Jaune blushed in embarrassment as they walked further as they noticed a fork in the road as the left said the long way and the right said 'shortcut'!"

End BGM

"Hmm…" Mario rubbed his chin in thought and looked at Luigi. "Hey bro, why don't we split up for a while?"

"Sounds fine by me. Who are you taking with?" Luigi asked.

"Hmm…" Mario rubbed his chin in thought. "I'll take RWBY, Sun, Neptune and Nyx." He said.

Luigi sweatdropped. "You're leaving me with these clowns?" He asked, referring to the Reds and Blues.

"Oh come on, the only non-clown around here is me!" Church said.

"Says the guy who turns into a ghost on occasion." Grif said.

"Shut up!"

"Ah, don't worry, they probably won't hurt a fly." Mario said.

"You're also leaving me with Booniper." Luigi added.

"Not to worry, bro! He's a friendly Boo."

"Yeah… that likes to haunt me!" Jaune said.

"Oh, you too?" Grif asked.

"Yep…"

"You have JNPR, Yoshi, Poochy and Zwei with you. It's not too bad at all." Yang told him.

"G-good point." Luigi nodded. "So, see you soon?"

"Yeah." Mario nodded, both of them fist bumping and went their separate ways.

"Alright, let's-a go!" Luigi said and walked off with his group. "Just as long as there's no ghost houses around."

"Oh god, that's all we need." Grif groaned as Mario and his group walked together as they were talking and having a good time until they came across some kind of cliff wall in front of them.

"It's a dead end… great!" Weiss complained.

"Not necessarily." Mario said. "There's always more than meets the eye." He said and pointed to the wall. "See that keyhole over there? We just need to find the key to move forward."

"…Okaaaaay? How are we going to find a key in a huge forest?" Neptune asked.

"You're forgetting someone." Nyx smiled as she closed her eyes, activating her semblance, picking up on some friendly birds, a Koopa walking around… and a key resting on a tree branch. "There." She pointed to a tree as Sun quickly jumped over and grabbed it.

"Got it!" He said as he jumped off.

"Nice one!" Mario smiled as he took the key and put in the keyhole, as the wall magically opened up, revealing a Warp Pipe. "Let's-a go!" He said as they all hopped in.

World 2-Secret: Something's Fishy here…

BGM: Dire Dire Docks (Super Mario 64/DS)

As soon as they came out of the warp pipe, they quickly realized they were underwater as Neptune quickly panicked. Mario immediately swam to a near ? block and out popped several Penguin suits as he put one on and tossed them to the others, as they were put on as well.

"Ah, the Penguin Suit!" Ruby said.

"Wait, you can talk with this thing on underwater?!" Sun asked, as the color of his Penguin suit was nearly identical with Yang's, Neptune's was a lighter blue, and Nyx was a brownish color.

"Diving suits…?" Mario wondered, as he guessed that only he, Luigi and the Toads looked like Penguins wearing this thing.

"Someone help me! I'm drowning! I can't swim! I can't… breathe… under… water…" Neptune blinked, realizing that he was perfectly fine. "Oh, you gotta be kidding me!"

"Well, this is one way to get you to conquer your fear of the water." Sun smiled.

"Screw this! I'm going back up!" Neptune said as he tried to swim back to the warp pipe… but he wasn't getting anywhere… mostly because he couldn't even swim to save his life.

"Is this why you're afraid of the water… cause you can't swim?" Yang asked.

"Tch, no!" Neptune quickly defended himself while folding his arms and looking away as Sun gave a 'yes' nod.

"Well, come on, we gotta keep moving." Mario said as they swam together… while Sun pulled an unamused Neptune with them with his tail as Mario noticed a sleeping Cheep Cheep. "Oh!"

"What is it?" Blake asked.

"We gotta swim quietly. That's a Rip Van Fish and they're quite nasty when they wake up. They can be defeated easily, but kind of annoying."

"So what you're saying is… we'd be in a fishy situation if we wake it up?" Nyx asked.

"Heeeey!" Yang grinned, high fiving Nyx.

"I guess." Mario said as Neptune looked around with a raised eyebrow.

"Anyone else hear a muffled 'God dammit, Barb'?" Neptune wondered.

"No…? Who the heck is Barb?" Sun asked as RWB looked at Yang.

"Heh, suckers." Yang smirked as they kept going, taking down some Cheep Cheeps in the process as Mario explained the uses of the Penguin Suit, as he assumed RWBY knew about the ice balls since they traveled through Cheep Cheep Lagoon to save them… and as they were going by, a Rip Van Fish was awakened by their presence and followed them.

"Uh, guys?" Neptune asked, pointing to the Cheep Cheep.

"Oh boy…" Mario groaned a little as he fired an ice ball to get rid of it.

"Aww, I was gonna get it." Neptune said.

"No, you weren't. You're already frozen up because you're underwater! You'd do nothing!" Sun argued.

"Yeah, you're right…" He sighed as they proceeded onward until they found a P Switch.

"What's this?" Ruby asked.

"It's a P Switch. It turns blocks into coins, and vice versa. I'd save that for later, just in case." Mario suggested as they nodded as Blake picked it up as they swam a few ways until they saw some blocks as Mario instructed Blake to press it as she did so and most of the blocks turned into coins, all but one.

"Cool! But what about that one?" Ruby wondered as she swam over to it while collecting the coins and then hit the other block, revealing another key. "Oh!"

"And there's a keyhole on the ground." Sun pointed out as Ruby took the key and used it on the keyhole, as a Warp Pipe rose from the ground.

"Alright, let's check it out!" Mario said as he dove in and so did the others, while Neptune prayed that it wasn't more water.

End BGM

World 2-Ghost House: A haunting fight!

They launched out of the warp pipe and landed on the ground. "Oh sweet dry land! I could just kiss you!" Neptune exclaimed.

"You don't know where it's been, dude." Sun said.

"Oh, so it lead to here." Mario said, looking at a Ghost house in front of them.

"Soooo, we're just gonna go in there as penguins?" Sun wondered as Ruby spotted a ? block and ran over to it, hitting it and out came a lot of Fire Flowers.

"Oh yeah!" Ruby grinned as she took it and tossed it to the others, as they all absorbed the Fire Flowers.

"Back to actually burning stuff." Weiss said. Hmm, I wonder what it'd be like if I went against my dark clone when I'm equipped with a Fire Flower?

"Okay, I dig this!" Sun said, as his white shirt was now yellow with a huge fire flower on the back of his shirt and his pants was orange with fire painted on it, and his weapon were now an orange-ish red. "Heh, cool!"

"Whooooa, what the heck…?" Neptune asked, looking at himself as his jacket was now a lighter red with some fire embers on it and his jeans are now a darkish yellow as his white shirt was completely orange while his goggles had an orange tint to it. His weapon was now red and when he activated it into its spear form, the blade was red and had fire coming out of it. "Cool!"

"Hmm, interesting." Nyx looked at herself as her armor was now light orange with the trim being red as her belt buckle transformed into a fireball, while her boots changed to orange boots with red soles and her leather gloves were white and her scarf turned orange as her crossbows had a red tint to it while her combat knife was faintly glowing red and her pistol remained the same.

"I guess you can say we're all fired up!" Yang smiled as they all heard something very faint.

"There's that 'god dammit, Barb' again." Neptune said, looking around.

"Now I heard it, where'd it come from?" Sun wondered, unaware of Yang smirking.

Nyx chuckled. "I guess we're all ready to roast some enemies alive."

"Yep." Yang nodded as they all looked at the Ghost House before them.

BGM: Haunted Hallways (Luigi's Mansion)

They all walked in, their weapons and hands at the ready. "So what did that red flower even do?" Sun wondered as they walked in.

"It's a Fire Flower. It basically gives you pyrokinesis." Mario said. "You can even throw fireballs underwater."

"…Wait… fireballs underwater? And it doesn't just extinguish it?" Weiss asked. "How does that even work?"

Mario chuckled. "Well, you see, Weiss. It's actually because-"

"Hey guys, there's a Boo coming for us!" Neptune interrupted Mario as they turned to see a Boo coming for them.

"Alright, let's do this!" Yang said, lock and loading her gauntlets and proceeding to fire at the Boo.

"No, wait!" Nyx stopped her as the fireballs didn't faze the Boo. "Fire won't hurt the Boo. Light usually does the trick."

"Light? Uh, then explain Booniper!" Weiss said.

"Some Boos actually don't mind the light as long as it's not too bright." Mario explained. "The only way to defeat them is by finding a Light Block or… well, finding a Starman."

"A star what…?" Neptune asked.

"A Starman, or an Invincibility Star, whatever you want to call it."

"Oh, you mean one of those bouncing stars that makes you glow like a rainbow for a little while?" Ruby asked.

"Correct." Mario nodded. "All we can do is just ignore these Boos for now." He said as they walked around while looking at the Boo, as it looked away. "Boos are also incredibly shy."

"One of them warmed up to us though." Sun chuckled.

"And beat you in chess." Neptune said.

"I still demand a rematch." Sun muttered as Nyx giggled at this.

"You should've recorded that so I could've watched it." Nyx said.

"I wonder why no one took a picture." Neptune shrugged as they walked around the spooky Ghost House, keeping an eye on the Boos, including some Circling Boo Buddies as Nyx hit a ? block with her Crossbow as it had made a fiery trail, but once it hit the ? block, a vine popped out.

"Oh, I thought those were just a myth." Nyx said.

"Oooh! That usually leads to a secret area!" Mario said as he hopped up on it and climbed as the others followed, and then they went into a door where they were on top of a lot of blocks.

"I don't like this…" Blake said as they heard a deep laugh as they looked around as Nyx sensed something.

"Above us!" She warned as they looked up to see a Big Boo coming down, cackling.

End BGM

BGM: Boolossus (Luigi's Mansion)

"Well that's a big guy!" Yang exclaimed.

"Can we physically hurt it?" Blake asked.

"You can, but it won't get you anywhere!" Mario said as the Big Boo proceeded to chase them around as they launched fireballs galore at it but wasn't getting them anywhere as Nyx looked at the ground.

I wonder… Nyx thought as she picked one up, as it was none other than a Grab Block as it started glowing random colors as she aimed directly at the Big Boo and threw it as it smacked into it and turned around, glaring at Nyx. "Did I damage it?" She wondered.

"I think you did, considering he's angry at you!" Neptune exclaimed as he aimed his gun and shot fireballs out of it, but the Big Boo seemed to ignore him and went for Nyx as she quickly ran under him and shot him with the crossbows, but the arrows went through it and bounced off the walls.

Mario picked up a Grab Block. It's worth a shot. He thought as he ran over and threw it, hitting the Big Boo as it glared at him as it cackled wildly, calling in a few of his ghastly friends as the Boos tried to hit them, making things a bit more interesting, but they proceeded to power through and waited for the perfect opportunity to hit him with a Grab Block.

One of the Boos tackled Blake but she disappeared as her clone exploded into fire as the real Blake was behind Big Boo as she grabbed the Grab Block and quickly threw it as the Big Boo cried out in pain and exploded into nothingness as the Boos looked at each other and hightailed it out of there.

End BGM

"I'll be honest, that was the most interesting fight I ever had with a Boo." Mario admitted. "Usually I just ignore them unless I have a Starman."

"I guess some Boos can actually be killed by certain things." Ruby smiled.

"Ghosts… don't… die! Ehehehehe!"

"What was that?" Neptune asked.

Weiss paled a little. "Uh… let's just get out of here before anything else happens…" She said.

"Right." Mario nodded as they went deeper into the Ghost house until they finally found the back door and then found a warp pipe as they hopped on in.

World 2-Secret 2: Slip and Slide!

BGM: Snowball Park (Super Mario 3D World)

"Whoa!" Neptune exclaimed before falling on his butt. "Ice?!"

"This doesn't make sense! First a water area, then a Boo house and now THIS?! Need I remind you it was all in a row?!" Weiss complained. "Blake, you agree with this, right?"

"I try not to think about it." Blake said as they walked forward, being careful not to slip and fall.

"Are there any Ice Flowers around here? I think that'd help us." Yang said.

"I… don't think so." Mario said.

"I'm not picking up on any ? blocks." Nyx said.

"Drat!" Weiss groaned as they walked forward, knocking down Koopas with their fireballs and well, everyone, excluding Mario and Nyx, tried to burn down a Spike Top.

"What's the big deal?! How come we can't hurt it?!" Weiss asked.

"They're immune to fireballs." Mario said.

"What?! Now you tell us?!" Yang exclaimed in surprise.

"I did read that the entire Buzzy Beetle family is immune to Fireballs, and that would include Spike Tops." Nyx said.

"Unless you have an Ice Flower or a Koopa Shell, it's best to ignore the Spike Tops." Mario suggested as they kept going but he then stopped them.

"What is it now?" Sun asked.

"See those munching flowers? They're called Munchers and they too are impervious to fire." Mario said.

"Oh, so is there a way to kill 'em?" Ruby asked.

"Unless you have a POW Block, no. They're entirely invincible. Imagine my surprise when I found out that not even a Starman did absolutely nothing to them when I first encountered them." Mario said.

"What's a POW Block?" Blake wondered.

"A block with devastating effects once you hit it. Let's just say that." Nyx chuckled as they walked forward while avoiding the Munchers as they soon made it out of the icy cave and they realized they were now in a dark cave.

End BGM

"Where are we? It's so… dark and ominous…" Sun said as they looked around as Ruby noticed something as she took out Crescent Rose and looked through her scope.

"I see Bowser's Castle!" She said.

"What?!" Blake asked.

"You do?" Mario asked as he took a look, and then he saw it. "So that's where you're hiding."

"Awesome! Now let's go beat that Koopa down!" Yang said.

"Hold it! We're on top of a high cliff." Nyx said. "And, well… I imagine there's a lot of Grimm down there."

"Oh yeah, there's a lot of them. Most of them are Deathstalkers." Ruby said.

"That's gonna be fun…. Not." Weiss complained.

"For now, we gotta head back. Conveniently, there's a Warp Pipe right near us." Nyx said.

Mario growled, glaring at Bowser's Castle from afar and clenching his fists. "Guarda meglio la tua coda, Bowser. Sto per la principessa." (You better watch your tail, Bowser. I'm coming for the princess.) He muttered in Italian as they all hopped into the warp pipe.

They then found themselves back in Donut Plains, also finding themselves in front of another level. "Hey bro!" A voice called out to them as they turned to see Luigi and the others approaching them.

"Zwei!" Ruby called out as Zwei ran over and tackled Ruby, licking her as usual while Church and Simmons were giving Yang the death glare as she gave a cocky smirk to them.

"So, how'd it go on your end?" Luigi asked.

"Great! How about you?" Mario asked.

"Eheheh… well… it's-a long story." Luigi awkwardly rubbed his arm.

"Can't be that bad." Mario smiled.

"Well, it all started when we split up." Luigi began.

And now, for Luigi's side of the story!

Also, for clarity, the RWBY Castle Calamity moments are gonna be for the chapters that has a castle in it, so it's not gonna be every chapter.