(Just a little Halloween special! Also, I made the picture, (which goes with the story), and I'm hoping to start making some moodboards)

"FENTON!!! I NEED TO GO TO THE CRAFT STORE!!!" (Y/n) yelled as she ran into the lab. Fenton jumped slightly at the sudden, loud noise.

"Why?" he asked, both confused and suspicious.

"To get some stuff for my Halloween costume!" the young girl said cheerfully, "Can you take me?"

"Well, I can't, but Dr. Gearloose might be able to take you." Fenton replied. He usually walked to work.   (A/n: I have a headcannon that he can't drive. I saw something about it on a tumblr post, so yeah)

"And you can come with us!"

"(Y/n), I have to w-"

"Nope. You're coming." (Y/n) interrupted him. She then dragged Fenton all the way to where Gyro was at the moment.

"Can you take us to the nearest craft store?" (Y/n) asked him.

"No." he simply replied.

"Please????" the young duck pleaded, making a sad face. She knew Gryo wouldn't be able to resist-

"No."
Well, that failed. Time for extremes.

"Please, please, please, please, please, please, please, please, please, please-"

"Fine." Gyro relented, knowing that she'd just continue to annoy him until he gave in.

~

Soon, they were at the store. (Y/n) ran towards the paint section, Fenton following, and Gyro slowly coming behind.

"I need this redish color..." (Y/n) said to herself, while looking at a reference picture on her phone, and picking up tubes of paint.

"What are you going to be?" Fenton asked, trying to look at the picture on her phone, but she pulled it close to her so he couldn't see.

"You'll know soon enough..." she said, mysteriously. Fenton gave a confused looked, but knew that if she wanted something to be a secret, there was no use in trying to find out.

Next, they went and found some supplies for a helmet, of sorts. Then, it was off to another store for a pair of black fingerless gloves. When they got back, there was a box on (Y/n)'s work space.

"Yes! They're here!" she shouted, running over to the box, excitedly. she grabbed some scissors, opened the box, and pulled out the contents. It was a pair of sunglasses with purple lenses and a white varsity jacket. She took out the bubble wrap and other packaging and threw it away. (Y/n) then put the costume supplies in the now empty box.

(Y/n) had taken the contents home, so Fenton still didn't have a clue what she was going to be. He asked her several times, but she always said that he'd find out soon enough, as she smirked.

~

"Tomorrow is Halloween!!!!!!!!!!!!" (Y/n) screeched, running around in circles.

"You're acting like it's a big deal." Gyro said as he worked on a project.

"That's because it is!!!!!!!!!"

Gyro raised his eyebrows. 

~

"HAPPY HALLOWEEEEEEEEEEEEEEEEEEEEEEEEEEEENNNNNNNNNNNNNN!!!!!!!!!!!!!!!!"

Fenton turned around to see (Y/n) in a handmade Gizmoduck costume. She was wearing red sneakers, jeans, a black shirt, the purple glasses from the other day, the fingerless gloves, and the white varsity jacket, which had the Gizmoduck symbol painted on it. She was also wearing the helmet, which she had modified to look like Gizmoduck's. Fenton smiled. He'd been thinking about telling her that he was Gizmoduck, but hadn't yet.

"How do ya like it?" she spun around.

"It looks awesome!" his smile grew even bigger. A smile also spread on (Y/n)'s face. Gyro came over and smirked at the gleeful girl.

"Looks like Gizmoduck's got a fan." he mused.

"Yep! Gizmoduck is AWESOME!!!" (Y/n) exclaimed, running around in circles with her arms out. Fenton laughed at how childish she was being. Just then, (Y/n)'s phone dinged. 

Hey, (Y/n). Are you coming to the party at the mansion later? -Dewey

Yeah, of course! -(Y/n)

"What's that about?" Gyro questioned.

"I'm going to the McDuck Halloween party tonight!" (Y/n) answered, gleefully. Then it was time to get to work.

"Are you and Dr. Gearloose going to the party?" (Y/n) asked Fenton several minutes later. He nodded. "What are you going to be?"

"I'm going to be a revolutionary war soldier."

"Ooh. Historical." (Y/n) teased. Fenton just rolled his eyes with a smirk and kept working.

~

"Time to go!!!" (Y/n) shouted. She was back in full costume, and was waiting for Fenton and Gyro to come out in their costumes. Fenton was the first one out. He was wearing a bright blue and beigeish colored late 1700s-styled army jacket.

"Wow. That's a super awesome costume, Fenton!"

"Thanks." he smiled. Finally Gyro came out. His hair (or should I say feathers?) stuck out everywhere, and he had used some black hair chalk to make it look like it had been singed. He was also wearing a lab coat.

"Aren't you already a mad scientist?" (Y/n) joked. Gyro rolled his eyes.

"Really funny, (Y/n)."

~

"You made it!" exclaimed Dewey, as he rushed over to where (Y/n), Fenton, and Gyro had just entered the party.

"A ninja?" (Y/n) questioned. Dewey responded with a yes, and dragged (Y/n) over to where Huey, Webby, and Dewey were. Louie was a panda, Webby was a detective, and Huey was a...... (Y/n) had to ask him.

"A nerd." Dewey answered for him.

"Not just any nerd. A college nerd." Huey corrected him. 

"Big difference." Louie rolled his eyes, his voice dripping with sarcasm. Huey just huffed in response. 

Meanwhile, Webby had snuck off to get punch for (Y/n) and her. The boys had gotten theirs earlier. When she got back, (Y/n) thanked her for the punch, and the two of them talked for a good while.

"Wait. Why aren't you wearing a costume, Uncle Scrooge?" (Y/n) heard Dewey ask, and she turned towards them.

"I am." the older duck responded, monotone, "I'm a billionaire."

"That doesn't count. You're already a billionaire, so you can't be one for Halloween." Louie rebutted. Scrooge just mumbled a 'whatever', and left to go mingle with the guests.

Dewey grabbed (Y/n)'s hand, "Come on, (Y/n)!" he said, dragging her out into the middle of the dance floor.

"What?!" she gasped. An upbeat song came on, and Dewey started dancing to it.

"Dance with me!" he smiled with enthusiasm. He grabbed her hands and moved them around, like you would to get a small child to dance. (Y/n) shook her head with a sigh and a smirk, and started to dance with Dewey. Honestly, it was pretty fun.

~

"That was such a great party!" (Y/n) beamed, "Thanks for inviting me!"

"Of course!" Huey smiled. (Y/n) waved to the group as she walked out the door with Fenton and Gyro.

"Bye detective! Bye ninja! Bye panda man!" she giggled at the nickname for Louie, "Bye nerd!"

"College nerd!" Huey once again corrected.

"Whatever!" (Y/n) laughed as she got into the car.

"Have a good time, Gizmoduck?" Gyro asked.

"Yea-" Fenton caught himself, realizing that Gyro meant (Y/n), since she was dressed at Gizmoduck, "Sorry. I thought you said Fenton. I must've really misheard..." he covered.

"Um...yeah. I had a good time!" (Y/n) was confused about what had just happened, and how Fenton could mistake 'Gizmoduck' for 'Fenton', but she shrugged it off. 

(A/N: Hey!!! I hope you enjoyed this! I just want to say a few thing about this, real quick. First, if you understood all the costume references (except Gyro and Scrooge), you are awesome! Let me know if you understood all of them! Also, I named this chapter before I really knew where the story was going, but I left it. Originally, the only idea I had for this was 'reader dresses up as Gizmoduck for Halloween', but it needed to be a lot longer. So, yeah. Also, if anyone wants to see pics of the costumes, you can ask, and I'll show 'em.
Peace out!)