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KJ

Based on KJ from KJ's Final Ride (KJ animation series).
ExclusiveBrawler
KJ

Access

Exclusive

Awakening meter

—

Moves

8

M1 startup

—

How to get KJ

Not purchasable. Per the KJ page it is usable in private servers (the Private Server+ gamepass is not required), and in public servers only by developers and by the Top Donator (Monthly or All Time). The Characters page list says it can only be used by the #1s on the Donations board, while its Exclusive table says Developers, Top Donator (both leaderboards) and self-owned private servers. A free KJ server existed from December 21 2024 until May 24 2025, then was removed.

Passives

Unleashed Potential

Black Flash+: every critical hit becomes a Black Flash, but the damage multiplier drops from 6x to 4.5x. They still behave like normal crits (they last until the target is ragdolled).

This Should End It

Increased Wall Combo Damage: raises the wall combo to 32% and greatly increases its knockback. The infobox labels it 'This Should End it (Unlimited Flexworks)'.

Base moves

M1 Weak Seasons — Three strikes followed by a final kick with very fast startup; one of the quickest full M1 animations and, with The Strongest Hero, the fastest basic attacks in impact execution.

  • 1Ravage

    A gut punch pops the opponent up, followed by two strong punches into a rapid barrage that ends with a rising uppercut, then a whirl around the opponent and a heavy knockaway kick.

    • Grab-type move
    • Armor on grab
    • Can't be blocked
    • Can grab ragdolled players
    • Can be countered
    • Has the longest base move animation in the game (finishers excluded)
    • Finisher — Same sequence but the kick deals more knockback; triggers at 32.4%.
    25.5%CD 17.5 Seconds
  • 2Swift Sweep

    A sweeping kick takes the opponent's legs, then a direct kick to the head sends them tumbling back.

    • Can't be blocked
    • Can be countered
    • Acts like Hunter's Grasp: throws standing opponents further and grounded ones at a front-dash distance
    • The only combo extender in the moveset
    13.9%CD 15 Seconds
  • 3Collateral Ruin

    Pulls the hands back then thrusts them forward, forming a halo of red energy that erupts and blasts the opponent away.

    • AOE
    • Armor on use and during the attack
    • Can't be blocked
    • Can't be countered
    15%CD 23 Seconds
  • 4Spiraling Storm

    A counter stance with a shout; if the user is attacked during it they dodge, land two quick blows to the chest, grab, spin and fling the opponent.

    • Armor during the attack
    • AOE can bypass Death Counter and Death Blow
    15%CD 22.5 Seconds

Awakening

G 20 Series

Duration: The awakening row shows 'Duration: 3:10' beside the theme name; the Trivia says the theme plays indefinitely and the awakening lasts until a move ends it.

Awakening with a red aura and a spoken line, then a thrust-forward shockwave (a variant plays while moving). It gives four one-shot style moves (Stoic Bomb, 20-20-20 Dropkick, Five Seasons, Unlimited Flex Works), is used like The Strongest Hero's Serious Mode with a limited number of moves before it ends, and the fourth move needs 700 damage dealt first. The awakening intro row lists 0% damage and N/A cooldown.

Awakening moves

  • 1Stoic Bomb

    Rises to high altitude, crosses the arms and legs glowing, then dives so hard the ground explodes into a large crater, leaving the user unharmed.

    • Minimum damage 25%; damage scales with proximity to the explosion
    • Ends Awakening once used
    • I-Frames on use and during the attack
    • Does NOT bypass Death Counter or Death Blow (if up-close)
    Up to 100%CD One-Time Use
  • 220-20-20 Dropkick

    Charges at extreme speed, lands a Black-Flash-style punch, then closes in for a flying kick that severs the limbs; if it misses the user slides to a stop.

    • Does not end Awakening if missed
    • Can be interrupted at any time until it hits a target
    • I-Frames on-hit and during cutscene
    • Bypasses Death Counter and Death Blow
    Instant DeathCD One-Time Use
  • 3Five Seasons

    Plays the Needless OST theme as the user leaps and vanishes; you aim the target area from above, then five giant fists crash down there. One target is executed; others take 90% falling by 10% per extra target, down to 10%.

    • Another move can be used before Awakening ends (20-20-20 Dropkick then misses)
    • 4 second time-frame for selecting a location
    • I-Frames on use, during the cutscene and attack
    • Does NOT bypass Death Counter or Death Blow (if up-close)
    Instant Death, Up to 90% (AOE)CD One-Time Use
  • 4Unlimited Flex Works

    After a voiced cinematic (clapping, dancing, 'Series 21... by KJ') the user unleashes a reality-cracking punch with a colossal shockwave. With several targets in the final AoE, one takes 60% and the others 40%.

    • Ends Awakening once used
    • Has Armor Break
    • I-Frames throughout the whole move
    • Instant start-up
    • Needs 700 damage dealt to unlock; the requirement resets once it is used
    • Decently large initial AOE shown as a black domain-like sphere
    Instant Death, Up to 60% (AOE)CD One-Time Use

Wall combo

Furious Slap · 32%

About KJ

KJ cannot be bought, and the wiki is not consistent about who can use it. The KJ page says it is usable in private servers without needing Private Server+, and in public servers only by developers and by the Top Donator (Monthly or All Time). The Characters page list says only the number ones on the Donations board, while its Exclusive table adds developers and self-owned private servers. A free KJ server existed from December 21 2024 until May 24 2025, then was removed.

The kit is built around Black Flash. Its passive Unleashed Potential turns every critical hit into a Black Flash at a 4.5x multiplier instead of 6x, and This Should End It lifts the wall combo, Furious Slap, to 32% with huge knockback. The base moves are Ravage (25.5%, 17.5 seconds), Swift Sweep (13.9%, 15 seconds), Collateral Ruin (15%, 23 seconds) and Spiraling Storm (15%, 22.5 seconds), a counter. The basic total is 70.5, fourth in the ranking.

The awakening, 20 Series, offers four one-use moves: Stoic Bomb (up to 100%), 20-20-20 Dropkick (instant death), Five Seasons (instant death for one target, up to 90% AoE) and Unlimited Flex Works (instant death), which only unlocks after you deal 700 damage. Among the Cons, the wiki notes that using KJ gains you no kills.

What the wiki notes

  • Wall combo Furious Slap: 32%, ~4 Seconds cooldown; it pins the opponent against the wall and ends with a Black Flash slap.
  • Pros listed: all awakening moves are one-shots; 20-20-20 Dropkick and Unlimited Flex Works bypass Death Counter and Death Blow and can one-shot The Frozen Soul; Collateral Ruin gives armor and is immune to base moveset counters; Stoic Bomb and Five Seasons have huge AoE and can refill the awakening bar on groups.
  • Cons listed: only available in private servers, as developer or as Top Donator; no kills are gained when using it; base moveset does not deal great damage; little combo potential; Ravage and Swift Sweep start-ups can be cancelled.
  • Five Seasons and Stoic Bomb can be countered by Death Counter and Death Blow; only Unlimited Flex Works bypasses armor; neither Five Seasons nor Stoic Bomb bypasses Wild Psychic's passive shield.
  • It is the only character with voicelines in its moves/awakening and the only one with numbers in a move name.
  • Awakening theme is Needless OST 'Vital Mission in the Spanish Desert'; the Unlimited Flex Works theme is 'Dive!!' by A-One Studio.
  • Ravage, Spiraling Storm and Collateral Ruin knock back so far that extending combos from them is hard.
  • Characters page ranks its basic-moveset damage 4th at 70.5 total.

KJ techs

Where the wiki disagrees

  • Who can use KJ: Characters page list says 'can only be used by the #1s in the Donations board'; the Characters Exclusive table says Top Donator, Developers and self-owned private servers, and 'Developers and Top Donators on both leaderboards'; the Characters Limited Time table says 'You can use KJ only on your private server'; the KJ infobox says Private Servers, Being Developer, Being Top Donator Monthly or All Time; the KJ page text says freely accessible in private servers without the Private Server+ pass; the Updates April 27 2024 entry says #1 donators get 'the developer character' (KJ itself was added December 21 2024).
  • KJ is listed twice on the Characters page (Limited Time Characters and Exclusive Characters), and the Exclusive intro says all such characters are exclusive to the PlayStation version.
  • Passive name: infobox says 'Unleashed Potiential', the Info table says 'Unleashed Potential'; the second passive is 'This Should End It' in the table and 'This Should End it (Unlimited Flexworks)' in the infobox.
  • Awakening duration: the 20 Series row says 'Duration: 3:10', but Trivia says the song never ends and plays until a move ends the ultimate.
  • Awakening end: the Five Seasons row says another move can be used before Awakening ends, but Trivia says Five Seasons ends the awakening even with Infinite Awakening on; 20-20-20 Dropkick ends it only if it lands.
  • Ravage: Characters page says it is guaranteed to hit in combat, but the KJ page says it can be countered and its start-up can be cancelled.
  • Damage total: Characters page says 70.5 total for the basic moveset; the four base cells add up to 69.4 (25.5 + 13.9 + 15 + 15).
  • Trivia on access ('Early Access Gamepass isn't required... either a large quantity of robux a private server is required') is garbled and was not used.

Other characters

Frequently asked questions

How do you get KJ in TSB?

Not purchasable. Per the KJ page it is usable in private servers (the Private Server+ gamepass is not required), and in public servers only by developers and by the Top Donator (Monthly or All Time). The Characters page list says it can only be used by the #1s on the Donations board, while its Exclusive table says Developers, Top Donator (both leaderboards) and self-owned private servers. A free KJ server existed from December 21 2024 until May 24 2025, then was removed.

Who is KJ based on?

KJ is based on KJ from KJ's Final Ride (KJ animation series).

What is KJ's awakening?

20 Series. Awakening with a red aura and a spoken line, then a thrust-forward shockwave (a variant plays while moving). It gives four one-shot style moves (Stoic Bomb, 20-20-20 Dropkick, Five Seasons, Unlimited Flex Works), is used like The Strongest Hero's Serious Mode with a limited number of moves before it ends, and the fourth move needs 700 damage dealt first. The awakening intro row lists 0% damage and N/A cooldown. Awakened moves: Stoic Bomb, 20-20-20 Dropkick, Five Seasons, Unlimited Flex Works.

Data taken from the The Strongest Battlegrounds Rblx Wiki (CC BY-SA), organized with AI assistance; nothing here is tested in the game; wiki read on 2026-10-24 (this page last edited there on 2026-10-14).