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

Also, to Apassingstranger: Don't worry about Cody, he said his condolences on the forum that we're all on and didn't feel like repeating himself twice.

World 1-3: Save Peach!

BGM: Athletic (Super Mario World)

"Okay… we ran for hours… and honestly… I give up…!" Grif groaned.

"We only ran for a couple of minutes, numnut!" Sarge told him, and it was true since they ran through the entirety of World 1-2 in a couple of minutes, and it was made easier with Yoshi eating Monty Moles and Koopas while Ruby took care of the Charging Chucks.

"It felt like hours…! I need to breathe!"

"…You are seriously out of shape…" Yang said.

"And all for good reason. He keeps eating all the Oreos at our base." Simmons said.

"Don't forget the Chips Ahoy and the cupcakes!" Donut added.

"Ah yes, those too!"

"I don't get it!" Grif said. "I eat all of that junk food and I'm seriously out of shape, but Mario and Luigi gets away with it by eating pasta?!"

"That's because we're always active." Mario said.

"Yeah!" Luigi nodded as they both high fived.

"Or when Nora eats pancakes!"

"I have a good metabolism." Nora smiled.

"And another thing! I've seen Ruby munching on cookies on that freaking ship before we got here! How is she not getting sick?!"

"Um… I'm not sick…?" Ruby tilted her head.

"Alright, bonehead. Calm down." Sarge said.

"Yeah, we just have to clear this mountain range." Nyx said.

"The WHAT?" Grif asked as he looked ahead. "…Oh hell no! I'm not doing it!"

"So you'd rather stay here and rot?" Simmons asked.

"I'm not going out that way. I'm just not a very good mountain climb- WHOA HEY, WHO'S TOUCHING ME?!" He yelled, as Poochy had gotten underneath him and made him sit down, as he happily barked.

"Yo yo!" Yoshi smiled.

"He says that he'll carry you." Mario translated.

"…Carried by a dog…" Grif groaned. "Just great…"

"Oh ho ho ho, that's awesome." Church said. "And totally blackmail!"

"I wanna ride on the doggy!" Caboose said.

"Caboose. No." Church told him as they went forward as Grif folded his arms, grumbling to himself that he's being carried by a happy-go-lucky dog that's probably more happy-go-lucky than Zwei.

They continued forward as Yoshi proceeded to eat a red Paratroopa… only to spit out three fireballs that got rid of some other Paratroopas. "Wait… what? How does that work?" Weiss asked.

"There's a very simple explanation to that." Mario said.

"It better not be becau-"

"Because they're red." Mario said, interrupting Church.

"Oh that's just bullshit!"

"There is another reason besides being red, but I'll explain later."

"Just tell us now!"

"How come we're not hurrying up to Peach?" Tucker asked.

"The problem is, we don't know where his castle is at." Luigi said.

"So basically, exploring until we find the bastard that took Peach?" Sarge asked.

"Yep." Mario nodded.

"Good enough for me!"

"Let's just hope it doesn't take forever." Grif said as they proceeded forward, and then saw a Koopa in his underwear, also known as a Beach Koopa.

"Woohoo! I wanna be just like that guy!" Sister exclaimed. "Completely in the buff!"

"Wait… what?" Yang blinked, trying to comprehend what Sister just said as the Beach Koopa was trying to find his shell but Mario kicked him away.

I'm concerned about her health… Nyx thought and just soon, they found the goal post and then press forward… only to come across a huge lake up ahead.

World 1-4: Nyx's Semblance

"W-water…?!" Neptune asked, freezing up in place.

"…Oh boy…" Sun groaned, facepalming as Mario had an idea and whispered in Yoshi's ear as Yoshi nodded and then Mario hopped off as Yoshi picked up Neptune.

"Wimp." Grif said.

"Says the guy riding on a dog." Simmons said.

"Shut up!" He growled, hearing a cackle from Booniper. "You too!"

"…Look at all those Cheep Cheeps…!" Blake said, drooling just looking at all of them.

"Careful, there might be a Big Bertha in that area." Weiss said, as Blake froze up, remember the last time she tried to chase a Cheep Cheep only to get eaten alive by a huge one.

"There isn't." Nyx said. "There's no Big Berthas in this area."

"Oh, cool." Ruby smiled. "…Wait, how do you know that?"

"My semblance. It's Super Sensory. I'm able to focus my senses to be able to pick up on others from afar in a large radius… however, the bigger the radius, the more it strenuous it gets for me, however I can manage 100 feet no problem… like, days at a time."

"Ooooh, so 101 feet is too much?" Caboose asked.

"It's pushing it, but yes."

"How about a hundred and a half?"

"Caboose! I think half is pushing it too!" Church said.

"Hundred and a quarter?"

"What do you think?!"

Nyx giggled. "I appreciate your concern, Caboose. I don't think it would but I never tried that… but I'm not going to press my luck." She said, winking at Caboose.

"You're welcome!" Caboose smiled back.

"So, basically, with your semblance, you're able to pick up on intruders?" Weiss asked.

"Yes. It enables me to warn you ahead of time of anything approaching us and gives me time to set up a trap and help corral an enemy." She said. "In fact, I'm picking up on a Grimm right now."

"What?!" Blake asked as they quickly got into position.

"Relax, it doesn't notice us." Nyx said as she pointed from afar to see a Beowolf sniffing the ground as it had just entered Nyx's radius, as they spied on it from a bush.

"It's probably a scout." Jaune said.

"Yeah, as long as it doesn't notice us, we'll be fine… but we need to be on guard." Nyx said as they walked forward… before aiming her Crossbow at a tree and shooting down a branch as she picked it up and then came back and skewered a Cheep Cheep before handing it over to Blake. "I believe you were wanting a snack?"

"Ooooh…!" Blake's mouth watered as she proceeded to chow down on the Cheep Cheep.

"…What's with her?" Church asked.

"Uuuuuuh, she really likes fish?" Sun said nervously. He and the others didn't want to reveal Blake's secret of being a Faunus to the Blood Gulch crew due to now knowing how they'd react.

"Why does Blake have cat ears?" Caboose asked all of a sudden.

"What cat ears?" Yang played dumb.

"Those cat ears." Caboose pointed to Blake's bow... with his gun.

"Caboose! Gun down!" Church yelled.

"Okay!"

"And that's just a bow! How can there ever be any-wait a minute." Church looked at Blake's bow, then at Sun's monkey tail. Then he took a double-take before putting two and two together. "Okay, what up with the animal parts?"

"Guess the jig is up." Ruby sighed.

"If you must know, Sun and I are beings called Faunus." Blake said.

"I don't follow." Grif said.

"Basically, it's a person with a single animal trait." Pyrrha explained. "Like, Blake has cat ears hiding under her bow, Sun has a monkey tail…"

"Sooo, basically, some dude fell in love with an animal and the animal birthed a human with an animal trait?" Tucker asked. "Or would that be the other way around?"

"So something like Tucker's kid?" Simmons wondered.

"You're a father?" Jaune asked Tucker.

"I wouldn't call it that." Church grumbled.

"What do you mean?" Mario asked.

"Don't ask. Ever."

"That sounds hot!" Sister grinned, completely not noticing them mentioning Tucker's kid.

"No, I don't think it works like that." Weiss said.

"Then how does it work?!" Church asked.

"No one knows." Yang said.

"Yeesh… one of the world's biggest mysteries, I imagine." Church said and looked back at Neptune. "How's the baby doing?"

"Still completely terrified." Sun said.

"Water… why did it have to be water…?!" Neptune whimpered.

"Yeesh…" Sarge whispered as they kept going onward until they reached the Goal post and soon, the place got dark.

End BGM

"…Are we away from the water?" Neptune asked.

"Yes." Nyx nodded as Neptune quickly hopped off of Yoshi.

"Booyah! Totally conquered that place!" Neptune grinned.

"You didn't accomplish anything…" Ren told him.

"I was supervising." Neptune folded his arms with a smirk, causing Sun and Church to facepalm.

"So uh… why did the place go dark?" Caboose asked.

"We're at a castle." Mario said as they looked at a castle before them.

"So, we finally found Bowser. Let's take him down!" Sarge smirked, cocking his shotgun.

"Um, guys? I don't think its Bowser." Jaune said.

"What makes you say that?" Nora asked.

"Look at this sign." He said as they looked to read the sign.

"Iggy's Castle: BAHAHAHAHA!" The sign read.

"Iggy?!" Luigi paled. "Bro…"

"I know…" Mario nodded.

"Who's Iggy?" Blake asked after she finished her meal.

"Only the most insane Koopaling of all time!" Luigi exclaimed. "Or as everyone in the Mushroom Kingdom calls him: The Demented Koopaling!"

"That's a bit harsh…" Weiss said. "Is he really that bad?"

"He has a Chain Chomp for a pet." Mario said, causing Blake to pale.

"Yeah… that's bad." Blake said.

"Nonsense! We'll take him down before we take down his pet!" Sarge declared as they opened the doors… but as they did, Yoshi, Poochy and Zwei were suddenly electrified, all of them crying in pain.

"What the?!" Ruby asked.

"What's going on?!" Weiss asked.

"AHAHAHAHA! NO ANIMALS ALLOWED, YOU MORONS! HAHAHAHAHA!" A voice from the speakers.

"He's going to pay for that for what he did to Zwei…" Ruby growled.

"Don't forget Poochy and Yoshi." Weiss said as they took off.

World 1-Castle: Iggy the Demented

BGM: Bowser's Castle (Fortune Street)

"Lava?! Of all the places to have lava… why does a castle have lava?!" Grif asked.

"Probably to make it menacing." Yang said. "That's what I think."

"I always thought the same thing." Luigi said.

"So, how are we going to get across?" Church asked.

"Oh! Look!" Ruby pointed as she pointed to metal gates that some Koopas were climbing through. "We can go through the gates!"

"That's a bit dangerous…" Weiss said. "I think we should think of a different way like find an invisible path of blocks or.. something because we're not going to get around this pool of lava!" She said.

"Um, Weiss?" Blake got her attention as she saw Yang already climbing through and knocking down Koopas.

"Oh come on!" Weiss sighed as they proceeded to do so.

"Yeesh…! Could you imagine if you slipped and fell?" Church asked.

"No thank you! I don't want to imagine that!" Tucker said.

"Yeah, and besides… I'm planning on getting burned a different way!" Sister said.

"…Wait, what?"

As they kept going forward with all of them desperately holding on unless they wanted a nice hot lava bath, Jaune reached for the next part of the gate, but his hand slipped. "Ah!" He exclaimed as he was about to fall in the lava, but Pyrrha quickly grabbed his leg. "Phew…"

"Whatever you do, don't look down!" Pyrrha said… and Jaune looked down… or… up?

"AAAH! I don't want to be burned!" He exclaimed as Pyrrha saw that they were close to the ground as she proceeding to swing his leg. "Pyrrha, what are you doing?"

"Trying something."

"Um, I actually don't mind living, thank you very much!" Jaune said, but Pyrrha had enough momentum and swung him over, and then used her polarity to push him even further. "AAAAAH!" He yelled… and then was caught by Caboose who already made it over there.

"Hello!" Caboose said.

"…Oh…" Jaune chuckled and then got off as the others regrouped. "Heh, yeah… I knew there was ground up ahead. I wasn't worried at all."

Pyrrha folded her arms and had a knowing smile. "Is that so?"

Jaune blushed. "Okay, not really…" He said, causing Pyrrha to giggle and then walked forward, as it appeared to be a simple hallway. "Alright, this should be easy!" He said as he walked forward, but Nyx quickly caught his arm and pulled him back, and right then, a huge wooden pillar slammed on the ground, causing him to pale and gulped a little.

"You should be glad I have my semblance." Nyx said. "There are pillars everywhere on the ceiling, so we gotta be careful. Luckily, they're spaced out."

"…Well, in that case…" Sarge proceeded to push Grif forward.

"Hey, what's the big idea?!" Grif asked as he realized that death was coming down fast. "AAAAH!" He yelled as he quickly took off running as the pillars quickly tried to squish him.

"For a guy that's lazy… he runs fast." Sun said.

"Yeesh…" Neptune rubbed the back of his head and then Grif's screams were silenced.

"Ah, I love the smell of crushed Grif in the morning!" Sarge said.

"I'M STILL ALIVE… AND AT THE DOOR!" Grif's voice was heard.

"Drat!" Sarge growled as they proceeded onward until they all made it to the end, where there was a huge empty room.

End BGM

"Ahahaha! Welcome, FOOLS!" A voice yelled as they had their weapons ready for battle… and then a Koopaling landed on the ground, revealing to be Iggy. "Welcome to my arena, AHAHAHAHA!"

"You sure like to laugh a lot…" Weiss said.

"Hehehe! It's all part of the fun! Ahahahaha! Anyway, I'll be your entertainment for the day!"

"Meaning…?" Blake wondered.

"Meaning I will destroy you mercilessly! AHAHAHAHAHA!"

"Let's just get this over with." Luigi said as they got ready for battle while Iggy brought out his wand.

"Haha! Let's rock!"

BGM: Beloved Tomboyish Girl (Touhou 12.3: Unthinkable Natural Law)

Iggy proceeded to jump forward and proceeded to fire magic from his wand at Ruby but she quickly spun her scythe around to deflect it as she then used her semblance to smack into him… or so she tried but Iggy jumped up and proceeded to fire magic galore everywhere until he landed, as he then got into his shell and spun directly into Sun and Neptune before getting back up.

Weiss quickly summoned her Schnee Orbitars and fired at him, but he quickly danced around with glee and then smacked into her, and then shot magic at her to knock her back, only to be hit by icicles from her, but he simply didn't care as Yang jumped forward and punched him, but he backflipped and dodged the shockwave.

"Na na na na na!" He taunted and proceeded to slap his butt to taunt Yang even further. "Can you keep up with you being so top heavy?"

Yang's eye twitched. "Alright, THAT'S IT!" She yelled, quickly lunging forward and punching him repeatedly but Iggy kept dodging and proceeded to fire magic at her stomach to knock her back, and then a sniper bullet whizzed past him.

"Hmm?" Iggy looked around before shrugging it off.

"Dammit!" Church growled as the Reds and Blues attempted to shoot him, but Iggy proceeded to excitedly dance around and hit them all before spotting Blake running towards him.

"Not gonna work!" Iggy exclaimed and then shot his magic, but Blake disappeared. "…Eh?" He wondered, looking around as Blake landed on top of him. "OOOF!" He yelled as Blake kicked him away before slashing him and then Nora shot him with her grenade launcher to knock him into a wall… and then Nyx pinned him there while the arrows didn't exactly impale his arms, they did go under his arms, and getting him stuck. "Hey… hey! No fair!"

"Hehehe! This is gonna be fun!" Nora smirked, ready to blast him away as they all shot him, but suddenly a shield blocked him.

End BGM

"Huh?" Yang wondered and then Kamek appeared.

"Need some help?" Kamek asked.

"Yeah, I was gonna release the hounds until they prevented me from doing so!"

"Then allow me to assist." Kamek said, proceeding to unhook Iggy from his predicament.

"Alright, let's do this!" Iggy grinned and then pressed a button as three small Chain Chomps emerged from doors, as Kamek swung his wand around and used his magic on the three Chain Chomps, and they got bigger.

BGM: Dream Sailing – Gooper Blooper (Mario and Sonic at the London 2012 Olympic Games)

"MAMA MIA!" Luigi screamed as Blake paled just looking at the size of those three.

"AHAHAHAHAHA!" Iggy laughed maniacally as he hopped onto a chariot as Kamek flew off. "THIS IS WHERE IT ENDS!"

The Chain Chomps looked at all of them and barked, proceeding to go crazy and try to chomp down at them, but luckily, they got out of range, but Iggy was making it difficult by firing magic at them.

"WHO THE HELL HAS THESE CRAZY THINGS FOR A PET?!" Church screamed.

"THAT'S WHAT I WANNA KNOW!" Luigi yelled as they kept dodging as Ruby found the perfect spot and then aimed her scythe and shot Iggy in the back.

"Yow!" Iggy turned around and the Chain Chomps looked like they got a little redder as they lunged, seeming to be a little faster as they attempted to dodge again as Ren ran around and tried to shoot the Chain Chomps to get their attention as he then rolled out of the way as Nyx aimed carefully, waiting for the perfect spot to hit Iggy.

One of the Chain Chomps spotted Nyx and got the other two's attention and they lunged for her, forcing her to jump out of the way in time as they got stuck in a wall, as this gave Nyx the perfect opportunity and shot Iggy a few times with her two crossbows.

"YOW OW OW!" Iggy yelled as the Chain Chomps got themselves unstuck and were more enraged than ever, barking wildly.

"Oh god, they're totally pissed off!" Jaune exclaimed.

"Isn't there something we can do to get rid of these things?!" Blake asked.

"They're indestructible and only a Starman can knock them out for a little while!" Mario said. "Unfortunately, I don't have one on me!"

"Oh that's just great!" Luigi groaned.

"We need a distraction!" Sarge said. "Grif!"

"NO WAY!" Grif yelled as he proceeded to shoot the Chain Chomps along with Sarge, but the bullets didn't even faze the Chain Chomps as they wildly went around to try and bite them as trying to hit Iggy was harder with three enraged Chain Chomps.

"WAHAHAHAHAHA! This is too crazy, even for me! BUT WHO CARES! AHAHAHAHA! SIC 'EM! BITE 'EM! DESTROY THEM! AHAHAHAHAHA!"

"Someone needs to check into a mental hospital!" Weiss exclaimed as they kept going until Pyrrha finally found an opening and threw her shield as Iggy saw this and ducked.

"HA! MISSED!" He yelled, only for Pyrrha to call it back and whacked him over the head. "DOH!" He yelled, falling on the chariot and knocked out, which enraged his pets as they went all over the place until they made a huge hole in the wall and ran off, as Yoshi, Zwei and Poochy looked on in curiosity.

"Hey, does anyone feel something?" Black asked.

"Guys, look!" Green pointed as they saw three enraged Chain Chomps coming for them.

"OH, SON OF A…!" Red yelled as they took off running while Nabbit emerged from a bush, curious about them until Iggy's wand fell off of the chariot, as his eyes sparkled with glee as he took it, put it in his bag and took off… while the four Koopas soon realized they were running out of land as they dove into a lake as the Chain Chomps dove right on in and took Iggy with them.

End BGM

"Well, that was eventful!" Yellow said.

"…I think I need to change my shell…" Green said in embarrassment as the Chain Chomps emerged from the water, now completely calm and Iggy was on top of the middle one, spitting out water.

"Ooogh… I'll feel that one in the morning…" He groaned and then felt nothing in his hand. "Where'd my wand go?"

Back with the gang…

"Well, that's one Koopaling down." Mario said.

"Is Peach here?" Ruby asked.

"No, I'm not picking up on a princess… but I am picking up on someone else." Nyx said as she walked forward… and then came back with a Yoshi egg. "A Yoshi egg!"

"So we're saving Yoshis and Peach… that's good to know." Weiss said as they walked out with the Yoshi egg, while Mario came back out with a lever.

"I found this too!" He said and put it down, shoving the lever down and causing the castle to explode, leaving it to dust.

"Sweet!" Nora grinned.

"Alright, let's go!" Ruby said as they took off, but not before the egg hatched and a Yellow Yoshi emerged from it.

"Yoshi Yoshi!" The Yellow Yoshi exclaimed and then took off.

"Well, how about that! The miracle of life!" Sarge chuckled.

"Alright, let's go… for real this time!" Ruby said as they took off to the next part of Yoshi's Island… the Donut Plains.

Nan the Keyblade Master Presents: RWBY's Castle Calamity! (Part 1!)

"Let's-a do this!" Mario said, as he pushed the lever down… but no spark came out. "Hmm…? It's a dud?"

"Never mind that." Luigi said, as he reached in his pocket. "I just remember I had this in my pocket." He said, pulling out a Mega Mushroom as he ate it and grew huge.

"WHAT THE HELL?!" The Blood Gulch Gang yelled… well, except for Caboose, he was completely fascinated by the gigantic green plumber.

Luigi then brought out his hammer and chuckled, getting it ready. "FORE!" He yelled, swinging it hard enough for the castle to go flying off. "Hehehehe, oh yeah!" He grinned, and shrinking back down to size.

However, the castle landed in the water and a huge Big Bertha ate it… only to dislike the taste and spat it back out and it was heading towards the group.

"That was so awesome!" Ruby cheered.

"Yeah, that was cool!" Yang said.

"Oh, you guys…!" Luigi said, blushing in embarrassment and scratching the back of his head… only for the castle to smack into him. "WAAAAAAAAAAAAAAAAH!" He yelled, while the castle proceeded to land back to where it was.

"LUIGI!" Mario yelled.

"HOW DID THAT HAPPEN?!" Yang yelled.

"OOOOF!" Luigi yelled, as he smacked into a tree. "Ooooh…"

Sarge growled. "Fellas…" He cocked his shotgun. "It seems that we are at war with this castle."

"Oh no…" Weiss groaned.

"Yes… let's give this castle everything we have!"

So, me and my friends were talking and we thought "Hey, remember Mario's castle Calamity? Why don't we do our own version of that?"

And behold, RWBY's Castle Calamity is born and will continue until the end of this fic!