(I ain't gonna explain why I skipped certain episodes anymore, I just did and that's okay. Besides Y/n's main story really begins in Season 2. Also, I wrote these chapters like a week ago and just forgot to publish them so yall get a twofer today.)

???: In the dark recesses of the mind, a disease known as FEAR feasts upon the souls of those who cannot overcome its power...

[Finn and Jake chase a Fire Newt to the ocean while Y/n follows behind supervising.]

Finn: Come back, thief!

[The Fire Newt spews fire at Finn and Jake, it attempts to do the same at Y/n but he just opens his jaw and eats it.]

Y/n: Yuck, that tastes awful.

Jake: Whoa!

Fire Newt: Stop farting on me! It's gross!

Y/n: That's their thing not mine.

Finn: You can't just go around stealing boots.

Jake: Yeah, and you know the penalty for stealing boots. It's poots... on newts.

Both: [Laugh]

[The Fire Newt wades into the ocean to avoid Finn and Jake]

Finn: He's getting away in that lake!

Jake: Dude, that isn't a lake. That's an ocean.

[Jake stretches and heads towards the ocean, a poot following behind, barking]

Finn: [Laughs and runs after Jake] Bark! Bark! Bark! Bark! ...Huh?

[The hue of the ocean and sky changes to red and ominous music plays as a wave crashes]

[Finn backs away from the water as it washes onto land]

Finn: Uhh...

Y/n: Yo Finn, you good?

Finn: Yeah I'm fine.

Jake: [Laughing and farting on the Newt] Poots on newts! Poots on newts!

Fire Newt: No!

Jake: [Slow-motion] Poots on newts!

Finn: [laughs and starts removing his shoes] I'm coming, Jake. I'll poot on that newt as soon as I'm barefoot. Uh...

[The ocean turns a red hue again and ominous music plays as a wave crashes]

[Finn gasps and rapidly crawls away from the water]

Y/n: You sure you are fine?

Finn: Yeah... [Breaths heavily, his stomach rumbles] Ow! Why is my stomach going nuts?

[A black smoke rises out of Finn's navel]

Finn: Ow!

[The smoke forms into a face and laughs]

Y/n: Oh so it's this thing again.

Finn: Wh-wh-wh-Who are you?

Fear Feaster: I am the manifestation of your fear... fear of the ocean!

Finn: What? I'm not afraid of lakes, wells, or rivers, streams, or deep wells or puddles. Why would I be afraid of- [Screams and backs away from the water]

Fear Feaster: [Laughs] 'Cause you're a wuss.

Finn: I'm no wuss! I'm the hero around these parts!

Fear Feaster: Ha! You're too scared of the ocean to ever be a true hero.

Finn: Not true! I'm not scared of nothin'!

[Finn charges towards the ocean, screaming, but stops when he sees a wave crash]

Finn: [Shakes his head and takes a deep breath] I shall conquer my fear.

Fear Feaster: Yeah, right.

Finn: No! I will. I'll conquer my fear.

Fear Feaster: Of course you will, [Receding back into Finn's navel] and I live in a two bedroom apartment that doesn't smell like vomit [Laughs] ...Sarcasm.

Y/n: God I forgot that thing is such a jerk.

Finn: You've dealt with it before?

Y/n: Yes and No, for you, well you are gonna have to conqueror your fear. For me I just increased my internal body temp so high it just left.

 [Jake comes onscreen, panting, and shrinks back to normal when he reaches Finn] 

Jake: Dude. Dude, did you see me? I was all like womp, and then I was all like take this! Womp! Womp! And then... Hey, what's wrong with you, dude?

Finn: Jake. I think I'm afraid... of the ocean.

Jake: Say what, now?

Y/n: Yep, he's afraid of the ocean.

Finn: How come you arn't afraid of the ocean, arn't your powers fire based.

Y/n: Normally water extinguishes fire but my fire is so hot that water doesn't even effect it. I defy nature.

Finn: Aww man.... I need both your help to overcome my fear. Will you two do it?

Y/n: Oh umm..... about that.

Jake: Um... No... I don't really wanna do it.

Finn: Jake! Bro! Come on!

Jake: We're just messing with you. We'll do it. Hmm... Where to start? Oh, ok. I think we should just take a few steps in the water. You can hold Jake's hand if you're scared.

[Jake grabs Finn's hand and starts walking towards the water, but Finn doesn't walk and falls over]

Jake: Um... Oh it's ok, dude. I see the problem. It's just your feet.

[Jake walks over to Finn's feet and takes his shoes off]

Jake: [Manually moving Finn's feet forward one at a time] Boop. Beep. Boop. Beep. Boop. Beep. Boop. Beep. Beep. Boop. Beep. Boop.

Finn: Don't be scared. I shall not be scared.

Jake: [Still moving Finn's feet] Boop. Boop.

[The water touches Finn's feet]

Finn: I'm afraid! Ah! [Jumps on top of Jake and starts punching him] Jake, get me out of the water! Now, Jake! Now! Now!

[Jake inflates his head and walks Finn back to shore]

Y/n: Damn Finn, you really are terrified. This ain't good.

Jake: Hot jam! You're really scared of the ocean. In fact, you're so scared... it gives me an idea. Let's start a business of being scared of the ocean!

Y/n: I'm in. We should call it. Ocean Fearers Incorporated.

Jake: Nice.

Finn: Bro! Jake!

Jake: Ok. Ok. I have a plan to get rid of your fear. We'll start tomorrow morning.

Finn: But I must conquer this now! [Runs towards the ocean screaming] I'm not afraid of you!

[Multiple waves crash directly in front of Finn in rapid succession and a single droplet hits Finn's face]

Y/n: Jesus, man has more bones in his face then Willem Dafoe.

Finn: [Running backwards] I'm afraid of you! I'm afraid of you! [Screams]

Finn: [Exhaustedly crawls to Jake's and Y/n's feet] Ok, yeah. Let's try tomorrow.

[The scene changes to Finn and Jake's bedroom where Jake is sitting on top of a sleeping Finn]

Jake: Fiiiinn. Finn. Hey, Finn. Wake up.

Y/n: It's morning, now get your butt up!

Finn: [Opens his eyes] Morning, Jake, Bro.

Y/n: Ready for me to help you get over your ocean fear?

Finn: Yeah, man.

Y/n: Cool... but we can only do this if you ask us.

Finn: I'm askin'!

Jake: Then get ready for our three-step plan. Watch your troubles melt away with step one! Bro if you would?

Y/n: I gotchu Jake.

[Y/n punches the bedroom wall and the entire structure breaks apart, leaving Y/n, Finn, and Jake floating on Finn's bed in the middle of the ocean]

Finn: [Screams] Jake, Bro, are you crazy? This is not an OK thing to do!

Jake: Hey. Hey. Come on. The ocean is your friend, and you got friends all around you right now. Miles and miles of friends.

Finn: You're nuts. [Wriggles from side to side]

Y/n: Oh trust me, you ain't seen nuts before. [thinking] Man if only he could meet Jinx, she was nuts.

Jake: Don't try to struggle, man. [Pulls the blankets back, revealing that Finn is tied to the bed] I'll let you out in a second. You just need to calm down.

Y/n: Also don't try to break out of those. I tied em Boy Scout style.

Finn: Really? Ok. I'm calming down.

Jake: That's great. You're doing great. Ready for step two?

Finn: [Breathing heavily] Yeah, man. I can do it.

Jake: Alright, dude. Step... two! [Unties the rope]

[The bed collapses and falls into the ocean, leaving Finn floating inside his sleeping bag and Jake on top of him while Y/n floats in the air.]

Finn: [Screams] Jake, this isn't a joke! It's touching me!

Jake: Let it hold you, man! Let it hold you like a child!

Finn: [Heart pounding] I'm trying to let it hold me.

Jake: Control your breathing!

Y/n: In and out.

Finn: [Breathes in and out] This isn't working!

Jake: That means we gotta move to step three. Just don't scream.

Finn: W-what?

Y/n: Jake's just gonna push you underwater with his jowls. Just don't scream. Don't scream.

[Jake pushes Finn's head underwater]

Finn: What?!

Jake: Don't scream. Hold your breath, Finn. You got it, dude!

[Finn screams and bursts out of his sleeping bag, sending Jake flying into the water]

[Finn jumps onto Jake's head and starts pounding on him]

Finn: Get me away, Jake! Bro! Now, Jake! Bro! Now! Right now! Get-Get me away! [Screams]

Jake: Finn! Stop it, Finn! Ow!

[Finn grabs Jake's ears and stretches them until they catch wind and carry both Finn and Jake to an island of pre-war ruins while Y/n flies behind them]

Finn: [Laughs] I'm safe! I'm safe! How'd I do?

Jake: I think we should give up.

Y/n: Agreed.

Finn: What? I made it all the way to level three.

Jake: Look, Finn. It's not that we don't want to help you... I just don't wanna get beat up anymore. I mean this [Pointing to his face] is my bread and butter. I can't have you messing up my bread and butter, dude.

Finn: You two have to help me. I can't do this without you two.

Jake: Ok. Fine... but only if you swear not to hit me anymore.

Finn: I swear I won't hit you anymore.

Jake: And also swear to only speak in rhymes. Speak in rhymes all the times.

Y/n: I will do no such thing.

Jake: You don't have to.

Y/n: Dope.

(This is just a lazy excuse because I cannot rhyme at all.)

Finn: I swear... and pigs have hair.

Jake: Yes. Perfect. And since you want more... it's time for step four.

Finn: What? I thought you said it was a three step plan... man.

Y/n: He's not that good at counting.

Jake: [Laughs and grabs a small, rusty submarine] Come on. Let's go kick your fear of the ocean where the sun don't shine... in the sea cucumber.

Y/n: Oh god... It's Titan all over again. Hold on let me grab its controller.

[Y/n reaches into a pouch and pulls out a video game controller]

Y/n: Alright I'm ready.

[The scene changes to underwater where Finn and Jake are heading to the ocean floor in the submarine which Y/n is piloting with the controller]

Y/n: Alright, now we pray we don't implode.

Jake: Check it, dude. One hundred percent awesome-itude.

Finn: [Eyes closed, breathes heavily and shivers] Yeah. It's pretty math... you psychopath.

Y/n: I will take that as a compliment.

Jake: You know, it looks way more math if you open up your eyes.

Finn: [Opens his eyes] Whoa...

Jake: See, man? The ocean is beautiful. There's no reason to be afraid of things that are beautiful.

Finn: Hey. This isn't that bad. I'm actually glad.

Jake: [Points] Hey, look! A black abyss! Let's go check it out... sauerkraut.

Y/n: Heading towards the black abyss now.

Finn: No, Bro! Jake! Turn around! Turn around!

[Finn sees the Fear Feaster's face appear in front of the abyss]

Finn: Noooo!

Jake: Saying, "Turn around" twice doesn't count as a rhyme, dude.

[Finn attempts to push Y/n away from the submarine controls]

Y/n: Finn! Don't you dare!

Jake: Hey, you swore!

[Finn pummels Jake]

Jake: Ow! My bread and butter!

[Finn somehow manages to grab the controller from Y/n and jerks it violently]

Jake: No, dude! Don't!

Y/n: FINN NO! YOU'LL MAKE US IMPLODE!

[The submarine moves wildly and launches torpedoes, one of which hits a building]

[The building topples and hits the submarine, causing it to start filling up with water]

Y/n: Well, crap-baskets.

Jake: Don't worry, dude. Everything's cool. This is the perfect segue into level five. [Handing Finn a dive suit] Here, put this on.

[Finn starts putting on the suit]

Jake: Just make sure you don't pull the emergency tab.

[Finn pulls the emergency tab]

Y/n: And he pulled it.

Jake: No, dude! I said don't...

[Finn's suit expands rapidly and knocks Jake back, hitting his head against a valve and knocking him out]

[Finn floats to the surface and watches Jake descend into the abyss along with the broken submarine. Y/n decides to go after him.]

Finn: Jake? Jaaaaaake! Bro? Brooooooooooo!!!!!!

[Finn reaches the surface and jumps onto a buoy]

Finn: Jake! Bro!

Fear Feaster: [Laughs] Pathetic! You can't even overcome your fear now that your friends are about to die! Your un-heroic body will never let you save Jake and Y/n. [Laughs]

Finn: [Sadly] You're right.

Fear Feaster: What? Really? You think I'm right? Well, that's... that's great!

Finn: [Holding a wrench] If my body won't let me rescue my best friend, then there's only one thing left to do.

[Finn removes his helmet, hits himself on the head with the wrench and falls into the ocean]

Fear Feaster: No. Wait. No! Noooo!

[Finn lands on the ocean floor and wakes up next to Jake and Y/n who is standing over Jake]

Y/n: Oh Hey Finn. Nice of you to join us.

Finn: How are you breathing, much less talking?

Y/n: Simple underwater breathing spell. Child's play really.

[Jake groans]

Finn: Jake! Jake! Wake up!

[Jake opens his eyes]

Finn: You ok, dude?

Jake: Yeah, man. Wait... Finn, you did it! You conquered your fear!

Finn: What?

Jake: You're at the bottom of the ocean!

[Finn screams and tries to pull his emergency tab, but nothing happens]

Jake: Maybe we should celebrate on land.

[Jake grabs Finn and pulls his own emergency tab, so they both float to the surface.. Y/n swims after them quickly.]

[Finn and Jake run onto the beach and fall backwards.. Y/n lands next to them.]

Jake: I'm proud of you man. You did it!

Y/n: Nice job Finn, real proud of you.

Finn: Thanks, dude.

[Fear Feaster comes out of Finn's navel]

Fear Feaster: You've nothing to be proud of, boy! You will never get of your fear of the ocean!

Jake: Whoa, dude! What's with your bellybutton?

Y/n: It's a Fear Fester.

Finn: [To Fear Feaster] What the flip, man? I just swam to the bottom!

Fear Feaster: No you didn't, cheater! You just sank to the bottom. You will never be a great hero.

Finn: He's right. I'll never be a hero.

Y/n: Nah, he's wrong. You'll be a great hero.

[Finn's stomach rumbles and a black-smoke limousine comes out of him and parks nearby]

[The limousine's windows roll down and Three Wise Men come out]

Wise Man 1: Finn, you are wrong. The mark of a great hero is his flaw.

Fear Feaster: You know nothing, Wise Men!

Wise Man 1: Silence, Fear Feaster! We know a lot!

Finn: Wait... Why did you wait so long to tell me?

Wise Man 1: Because the limo driver's flaw is being late!

Limo Driver: Sorry. [rolls up window]

Wise Man 1: Farewell, Finn. You truly are the greatest hero of Ooo. Also nice to see you again Y/n, haven't seen you since you overcome your fear of Ifr-

[Y/n glares at them that tells them to "shut up"]

Wise Man 1: Nevermind, my apologies.

[The Wise Men go back inside the limo and then the limo drives back into Finn]

Finn: It's time for you to go away, Fear Feaster!

Fear Feaster: What? Am I supposed to live in your tummy for the rest of my life?

Finn: Everybody has a flaw... and it looks like yours is smelling like my nasty guts.

[Fear Feaster heads back into Finn's stomach]

Fear Feaster: [Sarcastically] Wonderful...

???: And so fear is forced deep within the soul of a hero. Conquered... at least, for now... [Maniacal laugh]