Finn the Human

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This article is about the Fighter. For other uses, see Finn (Disambiguation).

Finn Mertens the Human is a Fighter from the Adventure Time Universe in MultiVersus. He was revealed alongside the game itself on November 18th, 2021, and is part of the game's initial release roster, having been playable since the first Tech Test.


Finn Mertens is one of the main protagonists of the 2010 Cartoon Network animated series Adventure Time, created by Pendleton Ward. According to Ward, he had created Finn, as well as the rest of Adventure Time, in the perspective of a Dungeons & Dragons session, while taking influence from his childhood, which was primarily spent indoors. Ward would produce a script for an animated short and pitch it to Frederator Studios and Nickelodeon, with said animated short airing on January 11, 2007 on Nickelodeon's sister channel, Nicktoons. Although the short gained almost 3 million views on internet reuploads and won an Annie Award for Best Animated Short Subject, any attempts at pitching the series to Nickelodeon fell through. Frederator, not deterred by the rejection, went over to Nick's competitor, Cartoon Network, for a final pitch. Cartoon Network accepted the pilot and would only greenlight it if Ward could prove that "the seven-minute short made for Nick wasn't a one-hit wonder". The network also suggested that Finn and Jake live in a treehouse and not be nomads as was the original short, with the showrunners additionally recasting Zack Shada, who had voiced Finn's prototype Pen in the short, for his brother Jeremy, due to his more youthful sounding voice as the former went through puberty. As the show went on and Jeremy went through puberty himself, Ward decided to age Finn to coincide with Shada's age and make the show delve into more mature themes.

Raised by the anthropomorphic dog couple of Joshua and Margaret, Finn is a young teenage boy with an undying thirst for adventure who lives alongside his second adoptive brother Jake and their best buddy BMO in the Tree Fort. He is believed by many to be the last human in the Land of Ooo (which, as Finn would later discover, is not the case).

Official Biography

He’ll slay anything that’s evil. That’s his deal!


(Mostly) the last human from the Land of Ooo, Finn is a young warrior who has spent most of his life doing quests and helping the forces of good in their never-ending battle against anything and everything evil. With his sword, limitless imagination, and best friend/adopted brother Jake the Dog, there’s no villain he can’t defeat. When he’s not slaying evil, he loves just chilling and playing some video games with BMO.[1]


Finn's bombastic sword skills will make short work of his opponents. The more hits he lands, the more coins he earns... and those coins can buy some pretty sweet power-ups.

Default Variant

Finn's default look seems to be based on his debut design from Adventure Time, before gaining his robotic arm. With this Variant (and most other Variants), he wields his golden sword of battle, Scarlet, which he had until partway through Season 2.


Finn is an Assassin-type character specialized in pressuring opponents with his various sword strikes. His core mechanic lies in his coin system, where opponents that are damaged by Finn drop coins, which can be collected by him or his ally. These coins can be used to purchase special buffs from Choose Goose when Finn uses his Grounded Down Special, which grants effects to both Finn and his ally. These buffs last for limited time; if Finn is rung out while a buff is still active, he'll respawn without it.

Finn's Air Down and Side Specials have an interesting interaction with each other. His Air Down Special spawns a gem, at the cost of coins, and can use his Side Special (either ground or air versions) to dash towards the gem at high speed, functioning similarly to Garnet's Down Special, Gem Dash. This can be used both offensively or defensively, such as recovering from off-stage. Finn won't dash if the gem is too far away.

Unique to Finn, he's currently the only character in the game that can move while charging his ground attacks, giving him a lot of mobility and flexibility. All but his Air Up Attack use his sword, giving him extra hit with disjointed hurtboxes. This, combined with his above average movement speed and mobility, can make Finn a very oppressive fighter.

The bread-and-butter of Finn's lies in his Up Special, Backpack Attack!, which makes him spin his backpack around himself, hitting enemies multiple times. The backpack has a dragging-type hurtbox, meaning it'll effectively connect the hits. Finn can reliably combo his Grounded Up Attack with his Up Special against opponents on lower percentages, and many of Finn's other low knockback moves can also be chained into it.


HOLD 🡆 + J
Finn front flips forward then slams his backpack in front of him. The more COINS he has, the stronger this attack becomes.
CHARGE a forward chop.
A kick that BREAKS ARMOR. Finn will dash behind enemies he kicks. The dash has a COOLDOWN.
🡆 + J
CHARGE a stab that COMBOS into a series of swipes.
A COMBO of 2 forward sword slashes. The second attack can be CHARGED.
🡅 + J
CHARGE an upward slash that launches Finn.
An upward punch.
🡇 + J
CHARGE a plunging stab downward that BREAKS ARMOR and releases a shockwave that hits multiple times.
A downward chop.

Finn CHARGES and delivers a powerful high five attack that REFLECTS PROJECTILES. When Finn high fives an ally, he releases a large blast PROJECTILE around himself, if the attack CHARGE is high enough.
Similar to ground, but Finn bounces back on hitting a fighter.
🡆 + K
Finn rushes forward shoulder first, creating a barrier that blocks PROJECTILES. If the attack hits, he can act again immediately. If Finn has dropped a GEM, he will instead do his air version.
Finn does a dashing sword swing. The hit has a SWEETSPOT at the end of the move. If Finn dashes toward a fighter or COIN, he moves further and does more DAMAGE. If Finn has dropped a GEM, he will teleport to its position before the attack.
🡅 + K
Finn spins his backpack around, repeatedly hitting enemies who are caught in its VACUUM. The more COIN Finn has, the stronger his final hit is, but he will drop COIN on a successful hit.
Similar to ground, but Finn shoots upward during the attack.
🡇 + K
Finn shops for goods using his COIN. He can buy a STACK of HASTEN to increase his team's move speed, a STACK of BOOTY to give his team a PROJECTILE shield when he CHARGES attacks or BMO. With BMO, Finn will do a BMO chop instead of a high five. BMO utilises the high five CHARGE meter as well.
Finn stomps on his backpack, sending himself and his enemies upward. The more COINS he has, the more height he gets.

Finn uses COIN to boost his special attacks. When Finn hits enemies, the enemies drop COIN. Finn and his allies can pick up the COIN and increase Finn's COIN count.
Finn can move while CHARGING attacks on the ground, but his attacks only gain power if he moves. His Grounded Neutral Special attack CHARGES whenever he moves, even if he is not attacking.

Fighter Mastery Track

Finn Wins Icon.png

Finn Wins
Tier 1

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125 Perk Currency
Tier 2

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150 Perk Currency
Tier 3

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175 Perk Currency
Tier 4

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100 Fighter Currency
Tier 5

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250 Perk Currency
Tier 6

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275 Perk Currency
Tier 7

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300 Perk Currency
Tier 8

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325 Perk Currency
Tier 9

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200 Fighter Currency
Tier 10

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500 Perk Currency
Tier 11

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600 Perk Currency
Tier 12

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700 Perk Currency
Tier 13

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300 Fighter Currency
Tier 14


150 Gleamium
Tier 15

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300 Perk Currency
Tier ∞

Update History

1.05 Mid-Season Patch
  • Ground Neutral Attack
    • + Knockback scaling to 15.5 from 14
  • Ground Up Attack
    • + Knockback scaling to 20.5 from 19.5
  • Ground Down Attack
    • * Fixed an issue where this attack was not breaking armor on both hits

ValentiNeon Patch

  • - General
    • Weight reduced to 49, down from 51.
  • ~ General
    • Added Finn’s backback to his Ugly Sweater skin.
  • - Air/Ground Neutral Special
    • Active hitbox window starts 1 frame later and ends 1 frame earlier.
  • - Air/Ground Side Special
    • Ground version projectile shield active window decreased 4 frames.
  • - Air Down Special
    • Gem can now be destroyed by melee attacks while it is idle.
    • Gem now costs 200 gold, up from 100 gold.
  • ! Air Neutral Attack
    • Fixed an issue where this attack could destroy certain projectiles.

Hotfix Patch

  • 1: Reduces Finn's weight slightly from 51 to 49.
  • 2: Finn being able to change direction during the leap portion of his grounded down attack.
  • 2: Should read Fix for Finn being able to change direction during the Leap portion of his Grounded down Attack. (it's a hard to reproduce bug, so hopefully you won't be able to turn during that anymore.)

New Year Patch

  • - General
    • Weight: Reduce Finn’s weight to 51, down from 55
  • ~ Air Down Attack
    • Shifted the active frames on Finn’s Ground Chop by 2 frames and adjusted the hitbox in order to better align with his sword’s animation
  • - Ground Up Attack
    • Delayed jump and dodge cancel at the start of Slasher! by 5 frames.
    • Added 2 frames of whiff lag
    • Slasher!’s active frames now start 1 frame later and end 2 frames earlier. This change will better align Finn’s active hitboxes with Slasher!’s animation and reduce lingering hits.
  • - Ground Down Attack
    • Removed the hitbox on Finn’s hand, on Low Blow, Bro!

FestiVersus! Patch

  • ~ Hitbox Changes
    • Experimenting with a systemic change to eliminate Z-axis issues; as a side effect, all of Finn’s hitboxes have been resized slightly.
    • Arm and shoulder hitboxes have been removed from Finn’s sword attacks.
    • Fixed the hitbox on the base of Finn’s sword not being attached to his skeleton correctly, causing it to activate inside Finn’s body during sword attacks.
    • Feedback welcome on this change. We will roll this update out to the rest of the characters, if this update works well.

Season 2.02 Patch

  • - Ground Neutral Attack
    • Increased whiff recovery by 11 frames
  • - Air Down Special
    • Apples now have 2 ammo with a 10 second recharge
    • This is to prevent extremely passive play by constantly throwing an unlimited supply of apples
  • - Air Down Attack
    • Land cancel window delayed by 6 frames
    • Increased whiff recovery by 5 frames
  • - Air Side Attack
    • Increased whiff recovery by 7 frames on the first hit of Finn’s Air Side Attack
  • ! Air/Ground Side Special
    • Fixed an issue where Finn would use the Air version of Side Special on the ground if an apple was on the screen
  • + Air/Ground Side Special
    • Slightly increased the size of Finn’s Ground Side Special’s projectile-blocking shield

Season 2.01 Patch

  • ! Bug Fix
    • (Fern Skin): BMO VO lines added to BMO summon.
  • ~ Grounded Side Special
    • Knockback angle adjusted to be more vertical to prevent repeated ground bounce.

Season 2 Patch

  • - Weight
    • Reduced weight from 55 to 49
  • - Aerial Neutral Attack
    • Active hit frames start 2 frames later
  • ~ Armored Buns
    • Block buff is no longer consumed by light projectile attacks

Season 1.05 Patch

  • ! Ground/Air Neutral Special Attack
    • Removed errant hitbox on Finn's body.
  • - Air/Ground Neutral Special
    • (High-Five): 4 frames of endlag added
    • High-Five had nearly instant recovery previously. This change should give it a small window to be punished.
  • - Air Neutral Attack
    • Increased whiff lag (whiff recovery) by 5 frames.

Season 1.04 Patch

  • - General
    • Set dodge meter return to 7s from 6s.

Season 1.03 Patch

  • ! Bug Fix Side Air Attack
    • Can no longer ignore air special limits when branching into the attack.
  • - Air Down Attack
    • Instant cancel on hit removed.
  • - Ground Side Attack
    • Instant jump cancel on hit removed.

Season 1.02 Patch

  • + Assassin Passive:
    • Removed 5% damage taken debuff.
  • + Passive:
    • Increased starting gold to 200 from 100.
  • + Air/Ground Neutral Special:
    • Fixed an issue where the shockwave from high-fiving an ally would not hit enemies.
  • + Air Up Special:
    • Adjusted vacuum hitbox to more consistently combo into the final hit.
  • + Ground Down Attack:
    • Increased minimum distance traveled.
    • Adjusted vacuum hitbox to more consistently combo into the final hit.

Season 1.01 Patch

Since we removed some power from the Backpack on Finn, we’re pushing some additional power into the rest of Finn’s attacks to give him more kill options.

  • + Air/Ground Neutral Special:
    • Increased base damage from 5 to 6
      • This base damage is increased by holding and charging the attack
  • + Air/Ground Down Special (BMO Chop)
    • Increased Damage from 18 to 20
    • Increased Knockback Scaling from 18 to 20
  • + Assassin Passive:
    • Reduced extra damage taken from 14% to 5%.
      • We’re evaluating if this passive should be removed entirely. We want to take a step towards that while trying to not to go too far too fast. We don’t want to create an assassin dominated meta.
      • Movelist Description of this change will not be updated until the next patch

Season 1 Patch

Fighting against Finn felt too difficult as Finn felt a bit too safe and could throw out attacks without much fear of a punish due to how quickly he recovered. Hurt/Hit box foundational updates are coming soon, but will not be in this patch.

  • - Passive - Attacks affected by Attack Decay no longer spawn coins

Finn now spawns with 100 gold instead of 200

  • + Air Down Special - Fixed an issue where the gem required 200 gold to spawn, but only cost 100 to spawn. Gem now requires and costs 100
  • - Air Side Special - Added additional whiff recovery.
  • - Ground/Air Up Special - Reduced the strength of the vacuum effect on the backpack
    • Weaker hits of the backpack will no longer “overwrite” stronger knockbacks from other attacks
    • Whiffing with all hits will still drop a coin
    • Added whiff recovery.
    • Hitboxes should better match the attack (not perfect until our planned hurt/hit box system overhaul)
  • - Air Side Attack - Reduced active frames to diminish Finn’s ability to hit fighters behind him
  • - Ground Down Attack - The distance Finn covers with this attack now scales with how charged the attack is.
  • - Ground Side Attack - Increased whiff recovery for the first hit.
  • + On The House perk - Fixed an issue where Finn still spent gold on gems spawned by the perk
    • Slightly reduced the launch speed of gems spawned by the perk – this should fix issues that arose when this perk was combined with the “Make it Rain, Dog!” perk

Open Beta V0

The goal of these changes are to reduce the easily achievable blazing movement speed Finn has access to.

  • ~ Grounded Down Attack:
    • + Hit 1 and 2 chain together more reliably
    • - Reduced knockback on second hit.
  • + Aerial and Grounded Up Special: Hitboxes now connect into each other more consistently.
  • - Base Movement Speed: Reduced from 2200 to 2100.
  • - Grounded Down Special: Boots of Speed now gives 10% increased movement speed on first purchase, 5% on the second stack and 3% movement on each subsequent stack, reduced from flat 10% on all stacks. It is now capped at 10 stacks reduced from unlimited stacking.
  • - Down Air Attack: Hitbox starts a bit later.
  • - Side Air Attack 2: Increased whiff recovery.
  • - Neutral Air Attack: Increased whiff recovery.
  • ~ Down Air Special: Crystal now counts as a projectile for perk application

Closed Alpha, May 19th 2022

  • Finn the Human was a playable fighter in the Closed Alpha.

November 18th 2021

  • Finn the Human was revealed to be a playable fighter in MultiVersus.


  • A large amount of Finn's interaction lines with Garnet reference a supposed crossover. What this is referring to is unclear, as Adventure Time and Steven Universe have never formally crossed over.
    • Fern also mentions this in his interaction lines with Garnet.
  • Prior to the Full Launch, Finn used to have his sword in his backpack during his victory and defeat animations. This has been changed to not involve it in his backpack anymore.
    • When emoting with Default, the sword will still be in Finn's backpack.
  • Also prior to that, Finn's Air Down Special was instead Throwin' Stones. This move involved Finn throwing a gem that he can grab and teleport to with Mathematical Air Dash. It was changed to Algebraic Stomp due to Throwin' Stones being too clunky and out of character.