Disclaimer: I do not own any of the material appearing in this story.
BGM: Bowser's Castle (Paper Mario: The Thousand Year Door)
"Wow! It DOES have a back door!" Sarge exclaimed. "Nice job discovering it!"
"Yeah." Mario nodded. "We have the element of surprise here."
"Alright, let's go in!" Ruby said before they heard screaming as they turned to see Grif and Simmons running towards them with the Grimm right on their tails.
"OPEN THE DOOR! OPEN THE DOOR! OPEN THE DOOR!" They yelled as they opened the back door and then they all went in, closing it behind them right when a King Taijitu went in for the kill, but luckily, its teeth shattered when it hit the door.
"Phew… that… was too close…" Grif panted as he was on his knees.
"I think my life flashed before my eyes…" Simmons said.
"Don't just stand there, we got a giant lizard to take down!" Sarge said.
"He's a Koopa, which is a turtle." Luigi told him.
"Turtles are reptiles like lizards, so it's a giant lizard!"
"Come on, we're close to saving Peach." Yang said as they walked forward.
With Bowser…
"Lord Bowser! Mario and his friends are in the castle as we speak!" A Hammer Bro reported.
"WHAT? How did they get past the Grimm?!"
"They used the Back Door."
"Didn't I have Kamek guarding the back door?! How'd they get past him?!"
"Who knows…"
"Fine… I'll do it myself!" He said and then thought of something. "Get Peach out of her cage. I have an idea."
Back with the group…
Yang picked up a Mecha Koopa and threw it at a few Ninjis, causing it to explode on them to knock them down as they went onward. "They're not very good guards, I'll give you that." Yang said.
"Tell me about it." Weiss said. "And another thing, why use a disco ball as a light?"
"I guess they wanted to be groovy?" Donut asked while shrugging as they picked up the pace before they went inside the door where they found Bowser's throne, but he wasn't on it and Peach wasn't nearby either.
"Where are they?" Jaune asked.
"Bowser! Show yourself!" Mario ordered, but no answer came as they saw a Warp Pipe with a sign next to it saying "Enter if you dare!"
"…I've got a bad feeling about this." Luigi said.
"We should go. I'm pretty sure Bowser is in that Warp Pipe." Nyx said as they nodded and then hopped into the warp pipe.
End BGM
They jumped out of the Warp Pipe to see that they landed on the roof of the castle. "Are we on top of the castle?" Sun asked.
"We are." Ruby said, and then they heard ominous laughing, followed by lightning with a loud thunderclap.
BGM: Final Boss – Super Mario World (Fortune Street)
They then looked up to see Bowser coming down on his Koopa Clown car very slowly as he soon popped up from it with a cocky smirk on his face. "Hello!"
"Wow, he's a lot bigger than I thought he would." Simmons said.
"Is it too late for us to bail on this?" Church asked.
"It's never too late! Never too late for turtle soup that is!" Sarge declared.
"Fine! Let's just get it over with so we can get the fuck out of this fucking place!"
"Bring it on, losers!" Bowser laughed as he used his Koopa Clown Car to stomp on them repeatedly. They quickly rolled out of the way as best as they could before firing at the Koopa Clown Car, but it shrugged off their attacks like they were nothing. Bowser peeked up and breathed fire at them all, forcing them to roll out of the way, everyone except Grif and Church who were on fire and rolling around while yelling "STOPDROPROLL! STOPDROPROLL!" Pyrrha used her semblance to bring it closer to them. "Big mistake!" Bowser smirked, as drills came out of the Clown Car as it had a wicked smirk on its face, Pyrrha's eyes widened and she pushed it back.
"Have some fun with these!" He said, sending out a few Mecha Koopas, but Mario and Luigi jumped on them and then had the idea to throw them back, which exploded in Bowser's face. "Gah!" He growled as he attempted to stomp on them repeatedly again, but it was no use as Yang jumped up and punched the Koopa Clown Car, but all it did was hurt Yang's hand.
"Agh…!" She winced and shook the pain out of her hand before the Koopa Clown Car body slammed her away, but Yang quickly recovered.
"This bad boy's invincible! Bwahaha!" Bowser laughed and then breathed fire again, as they dodged while the Reds and Blues shot the Koopa Clown Car multiple times, but it didn't even leave a scratch, not that Church even hit it anyway. While the Reds and Blues were shooting, and failing, Yang had an idea.
"Ruby! Throw me!" She said as Ruby nodded and got on her knees with her hands out as Yang ran over, stepped on Ruby's hands and then she threw her up as she jumped up over to Bowser and landed in the Koopa Clown Car.
"Ack!"
"Hope you're hungry!" She said, cocking her gauntlets before seeing Peach, her eyes widened in shock. "Peach?!"
"Eyes on me, blondie!" He said, grabbing her and throwing her out.
"Guys, we gotta be careful!" Yang said after she landed. "Peach is in there!"
"WHAT?!" They all yelled.
"That little COWARD! He stole my idea!" Sarge yelled, shooting the Koopa Clown Car repeatedly, but it was no use as Bowser decided to throw cannonballs at them, having them dodge while Nora hammered a cannonball back at Bowser, severely damaging the Koopa Clown Car.
"Gah!" Bowser growled as cannons came out of the sides of the Clown Car and shot out Bullet Bills and Bob-Ombs, but they luckily dodged as Mario jumped on the Bullet Bills before landing on the side of the Clown Car… then hammering Bowser on the head. "YOW!" He yelled as Mario jumped in and picked up Peach bridal style.
"You're not hurt, are you?" He asked.
"Nah, I'm fine." She smiled, pecking Mario on the cheek as he blushed and then jumping out.
"What the… HEY!" Bowser yelled as Nora had jumped up and threw tons of Bob-ombs into the Koopa Clown Car, and they were all lit. "…Oh, son of a-" He growled, and then the Bob-ombs blew up, which made the Koopa Clown Car blow up, as he roared and fell right into the lava below the castle.
End BGM
"Victory!" Ruby cheered as they all cheered and hugged Peach… unaware of an airship lowering itself next to the lava.
"Bowser! Bowser!" Roman exclaimed. "Can you hear me? Say something… show a limb or something!" He said, as Bowser's head peeked out of the lava.
"I can hear you, you know!"
"Oh good… wait a minute, the lava doesn't bother you?" Roman asked.
"The amount of times Mario threw me in the lava, it's basically a hot spring at this point!"
Neo raised an eyebrow with a confused look. "So, you're used to it?" She asked with sign language.
"Pretty much."
"Well… there's only one thing we can do." Roman said as he ran over to the cockpit. "I say you should definitely use this!" He said, pushing a button, then one of the cannons aimed itself at Bowser and fired out a Smash Ball. "I knew that Emergency Smash Ball button would be useful!"
"…I actually forgot about that!" Bowser said as he smirked devilishly, as the Smash Ball got itself closer… before he grabbed it, and then he crushed it.
With the gang…
"Alright, I don't know about you, but I say it's time we take a vacation." Peach smiled.
"Totally." Yang said, stretching. "I could definitely take it easy… until we go back to Beacon that is." She chuckled… and then suddenly the airship lowered itself in front of them.
"Going somewhere?" Roman asked.
"Ugh, you guys!" Weiss groaned. "What do you want now?"
"You thought Bowser was done for?" He asked. "Guess again!" he said, and right on cue, the whole place started to shake violently as they turned to see something emerging from Bowser's Castle.
BGM: Bowser (Super Mario World 2: Yoshi's Island) (First 17 seconds)
"What… the hell is that?!" Yang asked as the castle crumbled before them, and then the creature stomped in front of them, roaring very violently to boot.
Giga Bowser.
End BGM
"Whoa ho ho ho! Now THAT is awesome!" Roman exclaimed. "Have fun dying!" He said as he and Neo went to a safe distance.
"Peach, get to safety!" Mario requested.
"Got it!" Peach nodded as she ran off, but then Poochy and Zwei proceeded to push her a little faster, and then they stood in front of Peach, growling at Giga Bowser, ready to protect her, but Giga Bowser wasn't interested in them, he was more interested in crushing the fools in front of them.
"This is gonna suck…" Church complained.
"I… just remembered I left the oven on at home." Luigi said as he turned around to walk away.
"I'll come with you." Grif said as he followed Luigi, but Mario and Sarge caught their arms.
"…Just once, I hope that would work." Luigi complained.
"How hard can he be?" Yang smirked.
"That's what all the ladies say about me. Bow chicka bow wow!" Tucker said as they got ready for battle.
BGM: 02 Battle (Super Smash Bros Brawl)
Giga Bowser breathed fire at the gang, as it was more bigger and dangerous than Bowser's flames as they quickly avoided the flames, but not enough to actually graze them. Ruby aimed her scythe and shot Giga Bowser repeatedly, but he shrugged off the bullets easily and used Whirling Fortress, forcing them to dodge as Yoshi got hit.
"Wah!" He cried before recovering and throwing eggs at Giga Bowser as he just brushed them off and proceeded to swipe at them with his claws, nearly slicing them to pieces if they hadn't dodged. Mario and Luigi proceeded to hammer Giga Bowser repeatedly but Giga Bowser kicked them away and spun around, knocking JNPR off their feet with his tail and then he jumped up and Bowser Bombed them, but fortunately they got out of the way in time as Weiss fired icicles from her glyphs, but he shrugged them off.
Giga Bowser roared as he suddenly grabbed Jaune. "Agh! Let go of me!" He ordered as he saw Giga Bowser licking his chops, causing him to lose color. "Uh, guys? SOMEONE HELP ME!" He yelled as Pyrrha's shield hit Giga Bowser's arm and Nora hammering the arm as well, forcing him to let go of Jaune but Giga Bowser back handing Nora away.
Ruby used her semblance to smack into Giga Bowser and slashed him repeatedly, but he kicked her away, but then she recovered once she landed on the ground.
"Anyone got any plans?! I'd love to hear them!" Church exclaimed as RWBY and JNPR summoned their other weapons and fired at Giga Bowser, but he wasn't even bothered by the attacks as he breathed fire at them all again, but Nora was at his side and knocked his head to the right, burning the Grimm coming to Giga Bowser's aid as they were basically burnt to a crisp.
"Uh, will our Stars do anything?!" Ruby asked.
"I don't know if they'll do anything!" Weiss exclaimed as she stabbed the ground with her Myrtenaster to try to impale Giga Bowser with icicles, but he quickly melted them once he was impaled. Luigi then did a Luigi Missile to smack into him, which actually turned into a Misfire and really did some damage on Giga Bowser, but he backhanded Luigi away before using Whirling Fortress again to deal some damage to them all.
"Argh…!" Yang growled.
"We can't get through to him!" Blake exclaimed.
"We gotta try!" Ruby said.
"No matter what we do, he's just wear us down before we all die from him!" Grif exclaimed.
"Then we gotta do everything we can!" Nyx told them. "I bet he's getting worn out too." She said. I hope. She thought as she fired several arrows from her crossbow but Giga Bowser brushed them off and breathed fire at them, as they dodged but it did burn Jaune, Neptune and Grif's foot.
"YAAAGH!" They yelled as Giga Bowser kicked them away as he kept breathing fire repeatedly as they kept dodging as they kept attacking Giga Bowser but he kept brushing off their attacks even though he's receiving heavy damage. He just didn't care.
"Okay, THIS is starting to get on my nerves!" Yang growled as she fired at Giga Bowser repeatedly with the others, but one by one, they started to grow tired and fell to the ground.
"No!" Peach exclaimed from afar as they tried to keep going, but it was no use as they had used all their energy on Giga Bowser and they fell when their stamina was spent.
"No… is this it… for us…?" Pyrrha wondered.
"…Men… it was an honor serving with you… and hopefully the Blues go first..." Sarge said.
"Screw...you..." Church said as Giga Bowser roared triumphantly and looked at the group with a smirk as he breathed fire at them to burn them alive… or they would be burned alive if all that came out was a small fireball.
"…What…?" Ruby wondered as they saw Giga Bowser falling to the ground as all of his energy and stamina ran out of juice, as he turned back into the Koopa King himself.
End BGM
"Uuugh…" Bowser groaned.
"So… who won…?" Nora asked.
"I think it's a tie…" Mario said as Poochy, Zwei and Peach came back and helped them up.
BGM: Peach's Theme (Mario and Luigi: Paper Jam)
"I'm glad all of you are all right, especially you." Peach smiled, gently kissing him on the nose, causing Mario to blush like crazy.
"W-Well… I… uh… eheheh… um…" He stuttered.
"Conseguir una habitacion ustesdes dos." (Get a room, you two.) Lopez said.
"Agreed, Lopez! Those two are the perfect couple!" Sarge grinned, causing Lopez to facepalm.
"Come on, let's go." Peach smiled… when suddenly, a claw grabbed her and pulled her away. "AAAAH!" She screamed as another claw grabbed an unconscious Bowser.
End BGM
"Sorry to ruin the moment, but we'll be taking over from here!" Roman laughed.
"Hey! Give her back!" Yang growled.
"No can do!" Roman laughed as suddenly, a portal opened up in the shape of a star. "See you chumps later!" He said and then took off into the portal, leading to the Star World.
"HEY! GET BACK HERE!" Mario yelled, catching his second wind and running after them.
"Mario, wait!" Luigi exclaimed, but then sighed. "Let's-a go…" He sighed as they quickly took off after him, straight for the Star World.
RWBY's Castle Calamity! (Final Part!)
BGM: Going Somewhere (Mario Party 2)
"So, you just want me to touch it?" Caboose asked.
"Yes." Church nodded.
"Okay!" Caboose happily walked over to it.
"You sure this is going to work?" Pit asked.
"It probably won't. But it's worth a shot." Church said.
"This is pointless. I should take care of it myself." Mewtwo complained.
"You couldn't even make a dent." Roy told him, which earned him a very nasty glare from Mewtwo. "Just saying!"
Caboose walked over to the castle, looked up and down on it and smiled. "Hello!" He said and then touched it.
"...Nothing's happening." Grif said.
"Wait for it." Church said.
And right on cue, the castle began to crack, and then crack some more... before exploding into bits.
*record scratch*
Cue an anime fall from everyone, well, except for Church.
"ARE YOU KIDDING ME?!" Everyone screamed, even Mewtwo was completely dumbfounded.
"Great! We only got seven more castles to go!" Church grinned. "We'll have Caboose destroy them!"
"You mean hug them." Caboose said.
"Right, right. Let's go!"
Seven castles destroyed later...
"...This is just embarrassing." Mewtwo growled, watching Bowser's castle fall to dust as Bowser had fell to the ground.
"What just happened?!" He asked.
"...Something very stupid happened." Yang said.
"Alright! Let's gang up on him!" Church excitedly said.
"Wait... wait a minute! I haven't even gotten into my Koopa Clown car yet!"
"Too late!"
"NOOOO!"
Peach, from her cage, winced from all the attacks Bowser was receiving. "Ooooh! That'll hurt in the morning!"
"OW! OW! MY TAIL! AAAGH! IT SHOULDN'T BEND THAT WAY! GAAAAAAH!"
RWBY's Castle Calamity end
In case if you're wondering why I didn't use the Giga Bowser song from Melee, well, it's very simple.
I'm not much of a huge fan of that song, to be perfectly honest.
I wanted to do something more... epic, y'know?