As a kid, Mimi found a devil fruit. He found the Rumble and Tremor fruit. The Rumble Fruit is elemental, so Mimi can turn into lightning. The Tremor fruit allows Mimi to cause huge tremors with one punch. He created a pirate crew with lots of crew members. He wants to become a pirate and become the King of the Pirates.

When Mimi was a little kid, he drowned in the ocean. When he woke up, he was in a room. There was a fruit at the side of the room. He thought it was a normal fruit and he was hungry, so he ate it. He didn't know that it was a Devil Fruit and that it gave him powers and made him unable to swim. He found a little door at the side of the room and went out. He found himself at the bottom of the sea. He tried to swim up, but he ate a Devil Fruit, so he can't swim anymore. Luckily, someone swam down and saved him. Mimi now has the power to control and manipulate lightning.

Two years later, Mimi was on the beach. A tidal wave washed the Tremor Fruit up onto the shore. Mimi saw the grey fruit and ate the tremor fruit. Mimi now has the power to control a tsunami and crack the air.

Seven years later

Mimi is now 13 years old. He started his training to become the King of the Pirates. He travelled out today to a town called Ice Town. The Sandy pirates claimed Ice Town as their base.

Mimi decided to defeat the Sandy Pirates as his first step to becoming the King of the Pirates. The Sandy Pirates have Little Sand as their captain. Goultard is Little Sand's right-hand man. Little Sand is also a controller of Devil Fruit. Little Sand has the Sand-Sand Fruit, hence his name. 

Mimi crept towards the Sandy Pirate's base, carefully avoiding people. Mimi saw Little Sand walk by. He charged forward and used Quake Punch. The wave vibrated the air. 

Little Sand turned into sand and dodged it. Little Sand jumped up and used Desert Spada. A sharp wave of sand rose out of the ground and headed for Mimi, destroying everything in its path. As it edged closer to Mimi, Mimi tried to block it with Rumble Dragon. Mimi's attack couldn't stop the desert sword, as it cut right into Mimi's arm, seriously wounding Mimi. "Desert Sunflower," yelled Little Sand as he placed his hand on the ground. The ground opened up, revealing a quicksand pit underneath. Mimi was sucked in immediately, suffocating him in the sand.

10 minutes later.

Little Yellow Bear walked towards the Sandy Pirate's base, ready to beat up Little Sand. As he walked closer, he realised an arm sticking out of the ground. Without hesitation, Little Yellow Bear pulled Mimi from the ground. Little Yellow Bear realised that Mimi had lost consciousness, so he took Mimi to the town's hospital.

When Mimi woke up, he realised that he wasn't on the ground anymore. Little Yellow Bear introduced himself to Mimi. 

 "Little Sand's weakness is water. When water touches him, he won't be able to transform into sand anymore, meaning that you can hit him," explained Little Yellow Bear. 

"Our village has been trying to beat him since they came here, but we couldn't beat them," stated Little Yellow Bear, sighing.

"What about I make you a deal. If I beat him, then you will have to join my crew and help me become the King of the Pirates," said Mimi. 

"Deal," replied Little Yellow Bear.

Mimi took three buckets of water with him to beat Little Sand. Mimi and Little Yellow Bear walked to the base where Little Sand and Goultard were. They went into a room full of sand. Little Sand had an advantage because of the room's design. Mimi brought water with him so he could hit Little Sand. 

Lightning struck the roof of the room. Goultard ran toward Little Yellow Bear so he could attack him. Little Yellow Bear used Fire Bullets aimed at Goultard. When it fired, Goultard created a light beam to deflect the attack.

"Move on," shouted Little Yellow Bear as he dodged another one of Goultard's attacks. Mimi moved quickly through the enormous room, scanning the room thoroughly, but Mimi still couldn't find Little Sand. Suddenly, Little Sand appeared behind Mimi and slashed Mimi in the back. Mimi turned around immediately and poured water all over Little Sand. "Time to die," shouted Mimi as he punched Little Sand right in the face. Mimi then used Severe Earthquake, which made Little Sand cough blood. Little Sand refused to quit and created a Sandstorm.

Little Sand used Sandstorm and Mimi countered it with Lightning Beast. Their attacks collided and created an explosion. Mimi immediately used his best attack, Thunderstorm. Thunder showered down everywhere inside the room. Little Sand got hit and lost consciousness. Little Yellow Bear was still fighting Goultard. Goultard used Divine Arrow. He pulled back the string of a bow and shot through Little Yellow Bear. Little Yellow Bear used Burning Blast as a large beam of fire blasted out from his hands. The fire beam came flying towards Goultard. The fire was too fast and hit Goultard. 

He lost consciousness almost immediately. They had won! The news spread like wildfire through the village. Everyone heard that Mimi had won. 

Mimi lost consciousness shortly afterwards. As promised, Little Yellow Bear joined Mimi's crew. "So, what are you going to name our crew?" Little Yellow Bear, curious, asked.

"I'm going to call it Unknowing Spinjitsu," cried Mimi excitedly. 

The villagers of Ice Town were so grateful that they gave Mimi a boat that they had built as a reward.

"If you want to get a flag for your pirate crew, you can go to the nearby town called Moon Town," said one of the villagers. 

"Sure, I'll be happy to go there," replied Mimi happily.

"Just be careful though, a legendary swordsman lives there," warned one of the villagers.

Ignoring the warning, Mimi replied, "If he is a legendary swordsman, I'm going to add him to my crew."

Soon, Little Yellow Bear and Mimi set off to find Moon Town.

Moon Town

A silent but deadly assassin crept through the dark alleys of Moon Town. He slid his blades onto his wings and headed for the Midnight Tower.

Dock

"What a wonderful day," cried Mimi, stretching his arms.

"We should probably look for the swordsman the villager was talking about," suggested Little Yellow Bear. Soon enough, Mimi and Little Yellow Bear arrived at the Door of Justice.

The Door of Justice was over 50 metres high. The gates blocked the World Government from the rest of the town. "I never thought the door would be this big," exclaimed Mimi in excitement.

"The question is, how do we get past the gate if it's so big?" asked Little Yellow Bear.

"Easy," Mimi exclaimed, slamming his fist against the door. The Door of Justice shook a little, but it didn't budge. "Oh right, we have to find another way in," said Mimi in disgust. They went around the other side of the Door Of Justice. They still couldn't find an entrance. 

Little Yellow Bear got an idea. "Let's ask someone in this town if we can have shovels for digging," explained Little Yellow Bear.

 "Sure," said Mimi. They went to ask for a shovel. They found a villager with a dark hat on. Mimi  asked, ''Can we borrow a shovel for digging?"

"Sure," replied the villager as he handed Mimi and Little Yellow Bear a shovel. 

At the Door of Justice 

Mimi and Little Yellow Bear grabbed the shovel the villager gave them. They started digging.

Ten minutes later, Mimi and Little Yellow Bear had dug deep into the earth, but they still couldn't get through. Frustrated, Little Yellow Bear used Flame Hand and burned through the dirt that led to the other side of the Door of Justice. They finally dug out of the other side and continued their mission.

Mimi and Little Yellow Bear ran inside a tower located behind the Door of Justice. The tower had a sign on the front gate, labelling it as the Midnight Tower. The sign on the tower also labelled it as forbidden. 

Inside, it was dark, and there were traps set by humans. The first level was a falling ceiling with spikes on it. Mimi and Little Yellow Bear ran to the other side of the room and ran out just before the ceiling fell to the ground. 

The second level had flying sickles flying everywhere. Mimi used Rumble and Flash as he dashed past all of the sickles. 

Soon, they arrived in a small room. Someone with two swords was sitting on a chair in the middle of a room. He jumped up and cried, "Let's battle."

"Sure," replied Mimi.

The guy on the chair used Air Slash and bolted towards Mimi. Mimi used 10 000 Volts Discharge, as a bolt of lightning zapped towards the guy on the chair and electrocuted him. He fell back, coughing blood. "My name is Kaku," the man on the chair said. "Remember, because I'm going to end both of your lives." In the blink of an eye, a cloaked assassin attacked Kaku from the ceiling. Kaku rolled out of the way to dodge the attack. The cloaked assassin unsheathed his blade and then slid it onto his wings. "Moonlight Hurricane!" shouted the assassin in the cloak.

A black and red hurricane wounded Kaku. 

Kaku disappeared into the shadows, leaving the cloaked assassin, Mimi, and Little Yellow Bear alone in the darkness. "Who are you?" shouted Mimi.

"I'm the legendary swordsman Little Bat," replied the cloaked assassin.

"What about considering joining my crew?" asked Mimi politely.

"Not until I defeat the CP9," replied Little Bat, vanishing immediately.

"Gee. He's impolite," said Mimi heading towards the stairs.

Mimi and Little Yellow Bear headed upstairs.

Level three

Mimi and Little Yellow Bear walked up to the fourth floor of the tall tower. Suddenly, Little Yellow Bear fell through a trap door without Mimi noticing that he was missing. As Mimi headed up the stairs towards level five, Mimi encountered Little Bat. 

Both of them arrived at level five, waiting for someone to appear. Immediately, Mimi noticed that Little Yellow Bear was missing.

Someone was lying on the floor in the middle of the room. The room transformed into a forest with a temple in the middle. Kaku jumped down from the ceiling and attacked them. "I'll go for Kaku, you go for Jabra, the guy lying on the ground," cried Little Bat, motioning to the guy lying on the floor. Jabra suddenly woke up and saw Little Bat. He charged forward to attack Little Bat. Little Bat used Midnight Execution and slashed Jabra on the back. Kaku used Pin Bullet and shot Mimi. Mimi used Thunderstorm to counter the attack.

"Do you want to see my true form?" asked Kaku menacingly. 

"OK," Mimi said. Kaku transformed into a giant square-mouthed giraffe. His attack power increased, making him stronger. Little Bat took a step to the side and used Wind Terror, creating a whirling twister that spun towards Kaku. Kaku leapt forwards and slashed the air, creating a blue light that collided with Little Bat's attack. Little Bat threw a rock at Kaku, distracting him. "Thousand Midnights, Whirling Blade," cried Little Bat as he moved at breakneck speed around Kaku.

Little Bat started launching continuous attacks at Kaku while running around. Little Bat stopped after Kaku was almost dead. "Red Moon," roared Little Bat as his blades turned red. In a fraction of a second, Little bat had already slashed Kaku in the chest, leaving a bright red scar. 

Meanwhile, Mimi was fighting Jabra. "Ten Finger Guns," shouted Jabra as he shot his fingers outwards, leaving two holes in Mimi's arm. Mimi jumped upwards and sent an electric bird at Jabra. The bird electrocuted Jabra as he fell to the ground.