Hey, I just found something out; in the Anime Misty is 10, in Electric Tale of Pikachu Manga (You know the one where Misty and Ash canonically had sex) she is 12, and in the Games, she is 13, and in Gold and silver, she is 16. The Pokemon timeline is weird, especially after Bill canonically created time travel without Pokemon helping him.
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Ash had taken the badge so Yellow and Brock congratulated Ash on receiving his second badge and on Gloom's evolution.
But Brock remembered he wanted to ask a question so he held himself back from swooning over the Sensational Sisters and turned towards Misty.
"Hey you mentioned earlier that you were an unofficial Gym Leader what did you mean by that?"
"Well, my sisters aren't very good as Gym leaders," Misty said glaring at her sisters, "So I made a deal to the league where if I made sure to send more water Pokemon and train, I would become the Gym leader when I become 13."
"Well I think you're doing just fine, you put up a better fight than your sisters," Ash said as the other three started looking everywhere except at Misty.
"I appreciate that, but now I need to go back to traveling until I can take over the Gym." Misty answers.
"Don't worry MIsty we'll take care of the Gym for you" Daisy promised her.
"But you know that big hole in the wall is going to take a long time to fix," Violet answered overdramatically.
"Yeah and we won't be able to take on challengers until this gets fixed, who knows how long it will take" Lily joined in.
"Besides you need to go do something since we got all the Beauty in the Family." Violet winked continuing to tease her sister.
Misty looked like she was about to yell, but Ash had a way to de-escalate the situation, "Hey I have a question If you all are sisters why do you all have different Coloured hair, that is not how genetics work."
Misty heard this and got an evil smirk, but her sisters were starting to sweat slowly trying to get away from their sister.
"Well my beautiful hair is all natural," Misty said approaching Daisy who was her closest victim, and grabbed her hair and Pulled it off, revealing more or less the same hairstyle but Black.
"But all of my sisters here have wigs," Misty said, holding up the yellow wig as Daisy tried to get it back and Violet and Lily grabbed their wigs as well.
Ash was trying to hold himself back from laughing, Yellow was relieved because she thought it was their actual hair, and Brock didn't waste the opportunity to flirt with them.
"Even with Black hair you are just as beautiful," Brock threw himself at the floor before turning to Lily and Violet, "I'm sure you two are just as beautiful even without your wigs."
Misty got annoyed seeing this and gave Daisy her Wig back before approaching Brock and doing the infamous maneuver of pulling his ear.
Ash was currently putting more effort into not laughing than he did when he battled either of them, and Yellow was trying to stop MIsty from ripping Brock's ear off.
After everyone calmed down (and Daisy fixed her wig) Yellow decided to break the ice, "So Misty what do you plan on doing now"
"Well like I said before I was planning on traveling and potentially training more Water Pokemon," Misty responded.
"Well if you want you can come with us." Yellow offered, which surprised Brock and Ash. (Before People start commenting, I literally just flipped a coin to decide, Ok now you can comment)
Misty was also shocked by what she said, "Really?"
"Yeah, why not, you seemed nice when you talked to me a few days ago and traveling is always better with friends," Yellow responded with a smile.
Misty turned towards Ash and Brock, "Well if you all are Ok with it,'
"Sure I'm cool with it," Brock responded.
"Well why not, we already have one Ex-Gym leader what's one more," Ash said patting Brock on the Shoulder.
"Well if you insist I guess I have to," Misty said in a bit of an over-dramatic tone.
"Well I was planning to take on some trainers on Nugget Bridge so if you'd like you can get anything you need then meet us there." Ash offered, and Misty agreed.
As Ash walked out he started thinking a bit, 'Well I guess she is going to follow me around then, well what happened anyway now I need to get through the Nugget bridge, though I was only telling half of the truth. Sure I would like to reap the rewards from beating up everyone on that bridge but the real reason I want to go there is to get 1 Pokemon.'
Brock, Yellow, and Ash stopped by the Pokemon center to quickly heal and drag Brock out after being knocked out by Chancy after flirting with Nurse Joy again.
They got to the Nugget bridge and Misty was waiting for them as they met up.
The Nugget Bridge connected Cerulean City and Route 24 and acted as more of a stadium where anyone could go to battle or watch the battles that occurred.
"Hey, took you guys long enough," Misty said
"We stopped by the Pokemon center so Ash could heal his Pokemon" Yellow answered
"And someone here got rejected with a punch to the head," Ash added which made Misty hold back a laugh.
Before Brock could defend himself Ash cut in again, "Well anyway are you guys going to battle too, I can't be the only one getting stronger."
"W-well I never battled anyone so it would be better if you all train and I can watch" Yellow responded timidly.
"Come on, it'll be fun. we can teach you if you want to," Ash said, trying to encourage Yellow.
After a bit of encouragement From Misty and Brock Yellow agreed to try battling, she seemed to want to impress her friends.
After asking around they found a bug Catcher named Cale and decided to guide Yellow in battling. Yellow used Dody to try to battle against his Butterfree.
Yellow didn't need to train like everyone else, in the manga her Psychic abilities were able to raise the levels of her Pokemon the more serious she was, enough to where her level 20 Pokemon could rival Lance's Pokemon.
Eventually, the battle reached its climax, "Dody Quick attack" Yellow called out, Dody ended up running at the Butterfree and Knocking it out. And Yellow celebrated with Dody.
She was about to heal Dody before Ash reminded her they were in public and let Clefairy use Heal Pulse.
After which they all split off and started battling other trainers, this went on for a few hours. And nothing happened until Ash was battling a Rattata.
"Nidoran Poison sting," Ash called out, as Nidoran's horn started glowing purple as he dashed to a youngster's Ratata.
"Rattata, no" the youngster called out as Nidoran was getting bored of fighting these weak Pokemon.
"Wow you're so strong I bet you could Beat AJ," the boy said with a smile
"AJ?"It took Ash a second to remember who AJ was.
"Yeah, he trains savage Pokemon and built a gym over there," the Boy said pointing over to Route 25, "they say he has never lost a single battle."
Brock was listening and was about to ask more questions before a familiar voice cut in, "He was undefeated but I gave him his first loss" turning to see Gary walking over to him.
(A/N: Ok two things one it was never really said where AJ's gym was so I took some creative liberties, and second I rolled a dice to see how Gary would have done against AJ and I rolled a 19, so yeah Gary destroyed AJ.)
"Hey, Gary" Ash called out as they clasped their Hands together to greet each other, "What are you doing here weren't you supposed to be so far ahead of me."
"Ha well I heard there was some strong Gym here so I had to come by to test their stuff." Gary said, "And what about you why are you still here you should have left a long time ago I didn't expect you to be this far behind."
Ash laughed a bit, "Says the one with a car, anyway I wanted to reap the rewards from battling everyone I could on the bridge."
Brock recognized Gary and approached the two, "Do you two know each other?"
"Hey I remember you, you're the Gym leader from Pewter right," Gary asked.
"Yeah I'm Brock but you didn't answer my question."
"Well we both grew up in Pallet Town, we started at the same time," Ash answered.
"Why didn't this come up before?" Brock was a bit surprised.
"You never asked, and it's not like I announce it every time I say my name," Ash responded, specifically making fun of how OG Ash would always announce himself as Ash Ketchum from Pallet Town.
Brock shrugged before Gary continued to talk, "Well anyway are you going to go challenge AJ too, a part of me wants to tell you what he uses, but a bigger part of me wants you to fail miserably,"
Ash: "Yeah sure, might as well it can't be that hard, after all, you beat him."
Gary: "Wow, big words from someone who has a Gym leader helping him."
Ash: "Big words from someone traveling with Cheerleaders and a car"
Gary: "Your just jealous you don't have cheerleaders"
Ash: "No I had a few who wanted to, I just didn't want gold diggers following me so they went back to you."
They went back and forth until they started laughing it off, "Anyway good luck I'm off, Green is probably ahead of us now, my ego can't have that, Smell you later." Gary responded before walking off.
At this Point Yellow and Misty came back to Ash seeing Gary walk off, "Hey who was that?" Misty asked.
"Just a friend from my hometown," Ash said before changing the subject, "Anyway, you guys done battling. I wanted to check out an unofficial Gym that was around here."
"My Pokemon are tired so I wanted to let them rest," Misty responded and Yellow agreed with her.
"I was mainly practicing with Zubat, trying to gain the handle on using a non-rock type Pokemon," Brock added.
"Ok then let's get going before it gets too dark, " Ash said, and everyone agreed.
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Misty's team
Staryu: Ability: Illuminate, Hidden ability: Analytic, Moves: Water Pulse, Rapid SpinPsywave
Seel(F): Ability: Thick Fat, Moves: Aurora Beam, Icy Wind, Aqua Jet
Shellder(F): Ability: Skill Link, Moves: Water Gun(Basic), Withdraw, Icicle Spear
Starmie: Ability: Natural Cure, Hidden ability: Analytic, Moves: Water Pulse, Rapid Spin, Psywave, Thunderbolt