Disclaimer: I do not own sgt frog, or the beta designs for partners. That is all from Mine yoshizaki's notes.
Let's see...Some background to this story. I purchased a book with Mine Yoshizaki's concept art of the original idea of sgt frog. It involved Natsumi's grandmother gaining Keroro as a tadpole and sending it to Natsumi and her raising him into a grown frog. It turns out Keroro was sent by an enemy planet to invade and the invasion has been programmed into him. (I think it's kind of like Goku from dragonball?) Anyway, her and her friend Mari take care of him.
I expanded on the original summary and idea for this, and decided to make a sort of au of what would happen if Keroro had come to pekopon three years earlier, because I felt sort of sorry for the five girls who Mine Yoshizaki drew but had no life or personality.
This story is a what if these girls had found them instead.
Warning: Since his designs for the girls had no personalities that he wrote I had to give them personalities and lives, but besides that they're his designs for them.
"Sergeant Keroro, of the Keroro platoon, your platoon has been tasked with a scouting mission on pekopon for the invasion. Don't worry, it's nothing to hard, I know you're a new platoon and all. Just a quick scouting mission."
Natsumi Hinata sat at her desk, chewing on the tip of her pen ready to write another letter to her grandma. She had found herself writing more and more letters than normal to her, and her grandma was probably the person she found closest in her family.
Her grandma loved to shower her in presents but this gift, the latest one, was probably the weirdest gift she had ever gotten from her grandma.
She read the letter her grandma had given her again.
Dear Natsumi,
I know you're feeling lonely and all so I thought I'd give you a friend. I found this little guy at my front porch, starving. I poked breathing holes in the box for him, so he'll be okay on the trip to you. Hope he's the companionship you need.
Lots of love!
Grandma
Natsumi looked back at the box and at her grandma's letter. Her grandma did remember that her mother hated pets, right? She would never be able to keep it. She appreciated the effort, but it was one of the stupider things her grandma had done.
"Maybe I'll call Mari-chan and she can take it home with her…" She hoped. Her best friend Mari, was the person she shared all her troubles with and the only person who was fine with her violent attitude and how she beat up all the boys at her school. "Better get it out of the box first. It's probably scared witless."
Natsumi carefully peeled off the lid of the box and opened it, to let the creature inside out.
"I'M FINALLY FREE!" A green frog, about as tall as her knee, jumped out of the box. "Gero, Gero, Gero, you'll regret imprisoning me!" On his belly was a star and he wore a yellow hat.
Natsumi jumped back, this frog like creature who talked being the thing she least expected.
"Y-you can talk!" She wasn't one to be frightened, but this was something weird and unknown.
"Of course I can you pekoponian scum, do the frogs on your planet not talk or something?" The green frog seemed disturbed and laughed a little at this notion, "Wait…You're not the old wise one who imprisoned me!"
"N-no! That was my grandma!" Natsumi told him.
"Hmmm…Your grandma? So even a barbaric race like pekoponians has family?" He seemed curious, "No matter! I, the great sergeant Keroro shall invade the planet even if pekoponians have family!" He cleared his throat, "Did I also mention that I was gorgeous? Cuz that goes with the great sergeant Keroro."
"You're a weirdo!" Natsumi pointed at him weirded out.
"Well, there's nothing that a pekoponian like you can do about it!" Keroro told her, "You'll be invaded whether you like it or not!" He began to move forward, his tiny green hands in a creeper position.
Natsumi grabbed the nearest thing to her, a small lamp, and threw it at the frog. It instantly hit and knocked him out. Thinking quick, she grabbed her bed sheets and tied him up.
"I…I need to call the cops…Or the government…Or someone!" She grabbed the phone and instantly dialed her friend's phone number, Mari, Mari always knew what to do when things went wrong, she was also quite smart for a twelve year old and would know exactly who to call or tell.
"Mari!" Natsumi yelled a bit too loudly into the receiving end of the cellphone.
"Yes, Natsumi? Please don't yell so loudly…" Mari reminded her, having a sweet and quiet voice.
"INEEDYOURHELP COME QUICK." Natsumi said all in one breathe.
"Um…Okay? May I ask what you need?" Mari asked
"No. You're wasting time! Just come quick! And now!" Natsumi hung up before Mari could ask anything else to look at the little green knocked out frog. She was glad he wasn't awake yet.
It wasn't long before the doorbell to her house rang, and Mari arrived.
"You get it, sis, I'm busy!" Her bratty younger brother yelled from the couch. Natsumi ran downstairs, opened the door, grabbed her friend's arm, and dragged her inside to her room, shutting the door behind too hard.
"What is it Natsumi?" Mari asked, pushing up her large circular glasses and brushing her short purple hair back with her hand. Did Natsumi want to do some more girly things like trying on her Mom's make-up or something?
"Uuuuuuuuughhhhhh…" Keroro began to wake up from the large slamming sound made by the door.
Mari stopped smiling.
"What is that, Natsumi?" She asked
"I don't know what it is. My grandma sent it to me as like a pet and he calls himself Keroro and he said he wanted to invade us or something? It's some sort of frog mutated thing." She told Mari, "I didn't know what to do so I called you."
"Boy, did that hurt." Keroro groaned
"He…He can talk?" Mari asked
"WHOA! Another one of you! You pekoponians are multiplying by the second!" Keroro deduced.
"Maybe we should talk to him, find out what he is…." Mari reasoned
"He's some sort of freak of nature, that's all I know…" Natsumi told her.
"Um…Hello…My name is Mari." Mari waved, "Natsumi tells me you're Keroro, right?"
"Yes. Yes, I am Keroro." Keroro responded
"What are you? Where did you come from?" Mari asked
"Ha! I come from a place way better than here! I am a keronian and proud to be one, from the planet Keron!" Keroro smiled
"H-he's an alien!" Natsumi realized, "We've got to give him to the government or something they need to know about him!"
"Natsumi….If you give him to the government who knows all the nasty things they'll do to him…He might be an alien but he's still a living creature. What are you here for Keroro?" Mari asked
"To invade your pitiful planet!" He declared.
Mari thought for a moment.
"But you've been captured. You've failed." She told him
"No worries, the rest of my platoon will come and rescue me!" Keroro smiled
"The rest of your platoon? How many of you are there?" Natsumi finally asked
"Four total I think….Maybe Five, I can't remember." Keroro admitted
"Where's the rest of your species?" Mari asked
"Uhhhhhhhh….They thought we were doing a good enough job on our own so they flew off." Keroro admitted. Natsumi breathed a sigh of relief.
"You poor thing." Mari looked down.
Keroro nodded agreeing with her, invading an entire planet was a hard job.
"We should let him go, he seems friendly." Mari told Natsumi
"Seems friendly? What are you, crazy? He wants to invade the planet! Letting him go on his own would be awful!" Natsumi told her friend
"Hmmm…." Mari thought for a moment, "Why don't you watch over him then? Keep him as a prisoner of war or something. So that he can't invade." Mari suggested
"No way! I don't like him at all! And Mom would never let me keep him!" She told Mari
"Your mom's never home. She'll never notice. And I'll help you. Do it for me, Natsumi?" Mari asked holding her friend's hand
"Fine. For you." Natsumi agreed.
"Guys! I'm still in the room! Heeeeeeeeeeeelllllllllllo?" Keroro asked
Natsumi turned to Keroro and cleared his throat, "Stupid frog, I will release you and let you live in my house, you will clean for me and do my chores in return for living here, in return I will not hand you over to the government and they won't dissect and experiment on an alien like you. No invading and you shall be my slave, are we clear, stupid frog?" Natsumi asked
"No way!" Keroro tried to act tough, "I'll never be your war slave."
"It's okay. In return you'll have somewhere to live, I mean do you really have another choice? I'm pretty sure the rest of your species pretty much abandoned you here. This way, you'll get a place to live." Mari smiled
"Are. We. Clear?" Natsumi repeated sternly crossing her arms and giving her best angry look. It usually made the boys at her school start running and it would certainly scare any alien idiot like Keroro.
"Eep!" Keroro thought for a moment, "Fine. I do need a base of operation. I agree to your terms and conditions, pekoponian!" Keroro told her.
"My name is Natsumi. But you'll call me 'Master Natsumi'" She told him cracking her knuckles. Keroro paled
"Fine." He agreed. Natsumi began untying him ready to tackle him if he bolted, but he didn't.
"D-do you think the army really abandoned me?" He asked looking at Mari.
"Well…They're gone now, aren't they?" Mari asked, "And they didn't take you with them?"
"No…..They said it would be an easy field mission but were terrified by the level of humidity here..." He admitted
"It's all right." Mari patted his head, "Hey, Natsumi, you have that weird room filled with boxes right? Can he maybe sleep there?" She asked
"That's exactly what I was thinking. Oh, and stupid frog? Don't show yourself to people here. They'd freak out." Natsumi told him
Keroro nodded wanting to do anything not to be beaten to a bloody pulp.
Soon enough she had tucked the alien frog away in the room filled with boxes telling him that he could remodel how he wished.
"Thanks Mari, you're really good with him." Natsumi told her
"He's just like a pet, who can talk. I'll come by everyday to make sure there's no problems." Mari smiled
"Why didn't you take him to your house?" Natsumi asked. Mari frowned for a second.
"My sister's not good with animals. Or people." Mari admitted, "Do you think he'll try invading us?"
"Nah. I'll keep him in line with punches. And….I'll try to ask Mom if I can keep him…" Natsumi decided
Mari nodded and smiled glad she could be of assistance.
Notes, in Mine Yoshizaki's design Mari was Natsumi's best friend who also knew about the frogs, I don't think Fuyuki existed in the story but I'm going to make him exist because this is a fanfiction. The frogs also had different names, but I'm going to keep them having their names, because it's a fanfiction.
Giroro's partner was a girl named China (pronounced Cheena) Yahigo. Giroro's name was Kekero.
Dororo's partner was a girl named Akiya Asagiri (I'm putting first names first even though it's supposed to be last) His name was Rokeke.
Fun fact, designs were different too, like Giroro had a scar on his belly and Dororo was dressed in a gas suit, Kululu's eyes were swirls instead of having glasses.
Kululu's partner was a girl named Haru Hamakaze, his name was Rororo.
Tamama's partner was a girl named Fuyumi Yukikaze. His name was Roroke.
Obviously they only used two syllables for keronian names.
Anyway, that's some notes from the original thing! I'll include more notes in later author notes.