A/N: Yeah I deleted that loud House super Mario bros movie crossover. That was going nowhere and I barely had ideas for that. That's why it's been rebooted into a Phineas and Ferb crossover. I don't own the Super Mario bros movie and Phineas and Ferb.
It's nighttime in the Mushroom Kingdom, a Toad is carrying a platter through the halls of a castle. But once he reached a special room he opened the door and turned on the lights. "Ok Bowser it's dinner time." The Toad said, but he looked at the cage and dropped the platter in shock, Bowser was not in his cage in fact it the door was ripped apart.
The toad began to run around the castle and exclaimed. "Bowser's escape!"
Princess Peach, who was fast asleep in her bedroom, was startled by the loud voice and walked out of her room in her pink nightgown.
"What did you say?" Peach asked as the Toad immediately rushed up to her.
"Your highness, it's Bowser! He's escaped and there's absolutely no sign of him!" The toad stated worriedly.
"He escaped!?" Peach exclaimed with her eyes widened. "How did he escape? He consumed a mini mushroom."
"He must have had help from some of his outside forces!" The Toad said.
"But who?" Peach questioned.
In the skies of the Dark Lands, Bowser's Flying Fortress was seen floating above the clouds as an air ship that had Bowser'd signature head at the front was flying towards it. The ship stopped on a landing point and a large plank lowered down from it before Bowser himself stepped down to the floor, where Kamek awaited him.
"Sire, it's so good that you're back." Kamek said with a bow.
"Do you now? Who do I have to thank to save me from my prison?" Bowser asked.
"Us, of course!" A young voice said as eight younger versions of Bowser with different looks and colour styles showed up from the ship. "You're welcome by the way, dad."
"Junior? You and your siblings save your own father." Bowser said. "I'm proud of all of you."
"You hear that? Papa's proud of us!" Lemmy cheered.
"We all heard him, Lemmy." Ludwig replied.
"Yeah he's proud of us!" Iggy shouted.
"Now we have much work to do." Bowser said. Get Peach and have her marry me!"
"Seriously?" Roy asked in annoyance.
"I'm not really sure about that goody two shoes princess being our new mom." Larry said.
"Kamek told us how she completely rejected you, papa." Bowser Jr said.
"That only makes me want to marry her more. And I will not take no for an answer!" Bowser said.
"Fine. We know better than to make you mad, dad." Morton replied.
"But if you're going to get married, then I want a boyfriend!" Wendy stated firmly.
"You shall get one Wendy." Bowser said.
"What about the rest of us?" Bowser Jr asked.
"We want girlfriends!" Ludwig exclaimed.
"Yeah. I really need one to like me!" Iggy said.
"Well, it's not like the princess has sisters or a brother." Roy admitted.
"What about the world those two stupid humans come from?" Lemmy asked. "You know, the ones who used the Super Star to kick dad's butt?"
Bowser snarls and walks up to Lemmy and grabs him by the tail. "You don't mention those plumbers while I'm around got it!" Bowser threatened.
"Yes, dad! I'm sorry!" Lemmy replied fearfully.
"Good. Now let's find you some dates." said Bowser.
"In that case, I say we look for the nearest pipe." Larry said.
"I may know where one would be for you to enter, great princes and princess." Kamek said.
"Tell us." Bowser Jr ordered with an eager smirk.
It's a sunny day in Danville, in the backyard two boys are sitting underneath a tree with a green platypus. Their names are Phineas and Ferb. "Any ideas on what to do today Ferb?" Phineas asked.
Ferb simply shrugged at him in response without saying a word.
"Yeah. It feels like we've done practically everything this Summer." Phineas admitted. "We really need to start planning ahead."
Then the slide door opens to reveal Phineas and Ferb's older sister Candace. "Busted! Wait don't you usually have a plan by now?" Candace asked.
"Nope not yet." Phineas said.
"Well you better come up with one soon! Today is the day I finally bust you two!" Candace declared before she went back inside.
"I'm sure we can think of something. Have we given an orangutan a bath?" Phineas asked and Ferb nodded. "That's what I thought."
The backyard's fence door opened up and stepping through it was Phineas and Ferb's friend, Isabella.
"Hey, Phineas. Watcha doin?" Isabella asked.
"Ferb and I are trying to figure out what to do today." Phineas replied.
"Maybe you could build a man-sized electric car track?" Isabella suggested.
"I don't think we've done that yet." Phineas replied.
"Then you should give it a try." Isabella said. "The Fireside Girls and I need to earn our Electric Wiring patches."
"Ferb, I know what we're going to do today." Phineas said with excitement.
"Great. I'll go bring everyone else." Isabella said before she ran out the way she came in.
"Sure thing." Phineas replied before he noticed someone was missing. "Hey, where's Perry?"
Perry is in the garage and walks towards the car. Then he puts on on his hat and slides under the car which leads to a tube that slides down to his secret lair.
Once Perry landed in his chair, he looked up to the massive screen and Major Monogram appeared on it.
"Good morning Agent P. We have received reports that Dr. Heinz Doofenshmirtz has been going in and out of the sewers. He could be planning another scheme." Monogram explained.
"Or training some turtles with pizza." Carl joked offscreen.
"You need to stop watching those 80s cartoons, Carl." Monogram scolded.
"Yes, sir." Carl said sadly.
"Anyway, Agent P, we need you to head down into the sewers, figure out what Doofenshmirtz is up to and put a stop to it." Monogram said.
Perry nodded as he exited his chair and ran towards a boat for his size. He jumps into the boat and drove into the sewers to face against Doofenshmirtz.
Meanwhile at the Danville park, a large green pipe was seen emerge from behind some trees and the Koopalings shot right out of it, landing ontop of each other on the ground.
"Ugh. That was a wild ride." Larry groaned.
"It sure was." Ludwig said as he rubbed his head.
"So, what's this place supposed to be?" Roy asked as he and his siblings looked out from behind a nearby bush.
"How should we know? We're not even from this world." Morton replied.
"We need disguises!" Iggy exclaimed.
"How about a fake moustache?" Lemmy suggested.
"I am never wearing a stupid moustache!" Wendy stated with a glare.
"A trench coat?" Larry asked.
"How about a cool hat?" Iggy questioned.
"Anything will do. We just need to find ourselves some girlfriends." Bowser Jr said before he heard Wendy clear her throat. "And a boyfriend."
"Thank you." Wendy said. "Now let's go!"
After they did a little magic using with a wand they borrowed from Kamek, the Koopalings were now in human disguises and they started making their way through the streets of Danville.
"Any sign of some good-looking human girls or a nice human boy?" Morton asked while keeping his fake glasses on straight.
"I'm looking! But I don't see anyone!" Iggy said.
"There has to be here." Ludwig said.
"If we don't find anyone to bring back with us as the loves of our lives, I'm gonna-" Bowser Jr said before he stopped, causing the other Koopalings to stop as well.
"Junior? Are you okay?" Lemmy asked, seeing the Koopa prince was staring mesmerisingly at something.
"Look." Bowser Jr pointed to Isabella walking down the streets with the Fireside girls. "She's beautiful."
"And check out those other little ladies." Larry said while smiling at the Fireside Girls.
"I think we found our dates." Iggy said.
"But what about me?" Wendy asked,
"You can pick from those three behind them." Ludwig answered, pointing behind the girls.
Wendy looked and sees three boys, she looks at Buford and Bajeet and cringed in disgust. But she sees Django and becomes swoons over him. "He's so dreamy, he's a hunk." Wendy cooed.
"That settles it! We're getting those human girls and the guy in the yellow shirt!" Bowser Jr announced.
"Yeah!" The rest of the gang cheered.
"Let's follow them!" Lemmy said before he and his siblings started secretly following the children, hiding in different places at every turn.
A/N: That's it for now please read and review.