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This article is about the character. For the ability, see Beast Out.
"Challenging my unit was both foolish and reckless! You are nothing more than my prey... One that is soon to be retired!"
―Slash Beast, Mega Man X4

Slash Beast, known in Japan as Slash Beastleo (スラッシュ・ビストレオ), is a lion-based Reploid in Mega Man X4. He is a member of the Repliforce, a group labeled as Maverick due to their wanting independence. He enlisted in Repliforce only to freely exercise his combat abilities, but despite this attitude he showed dauntless courage in battle, fearing no one. During the Great Repliforce War, Slash Beast was put in charge of guarding Repliforce's military supply train.

Power and abilities

Slash Beast possesses excellent hand-to-hand combat skill with his speed and strength, performing high jumps and claw attacks that pair with his combat skill.

  • Jump Attack - He jumps and attacks, varying the distance and height. Sometimes he will fall straight down to stomp the target.
  • Rush - He charges in the target's direction to attack with his claws. He can also grab his enemy and crash into the wall.
  • Twin Slasher - He can shoot crescent moon-like shockwaves from his somersault/invert front-flip kick moves.
  • Slash Beast will also defend against attacks after losing half of his energy.


The battle can be easy or hard depending on what character is being played. As X, the Ground Hunter is the best choice. The first hit will break his claws off, disabling his Twin Slasher attack, and any additional strike will cancel his attacks, trapping him in a loop. Zero has his work cut out for him, as he'll need to keep moving to avoid the charges, slashes, and (when his health is low enough) avoid getting grabbed and shaken like a ragdoll. Zero can hit him with Raijingeki if there is a clear shot.

Most bosses show the ability the player will gain during the battle. For X, his Twin Slasher is identical to the energy arcs generated by Slash Beast's somersault kick. For Zero, his Shippuuga comes from Slash Beast's charge attack when at low health.


Stage description: A military train is moving supplies. Cut off Repliforce's supply route.

Stage enemies

Enemies in Slash Beast's stage, the Military Train.


When Playing as X

Slash Beast: Challenging my unit was both foolish and reckless! You are nothing more than my prey... One that is soon to be retired!

When Playing as Zero

Slash Beast: You dared to attack my unit?! I'm gonna enjoy fighting you!

Other Media

Archie Comics

Slash Beast appeared in the Worlds Unite crossover event, in which he and his fellow Mavericks were revived by Sigma and fought against the unified heroes assembled by X, Sonic the Hedgehog, and Mega Man.

Rockman X Giga Mission

X8NavigatorAlertIconEdit This section requires expansion.

He was revived by the Extreme, becoming more powerful, but is defeated by X.



  • Slash Beast may be a tribute to Guile and Charlie from the Street Fighter series (like Magma Dragoon is to Ryu, Ken and Akuma). Like them, he is military and his somersault attack is similar to their "Flash/Somersault Kick" special move.
  • Oddly, Slash Beast's artwork shows him as orange and yellow, although, in-game, he is brown with yellow highlights.
  • Slash Beast is one of two Mavericks in the X series to have two separate battle entrances. In the first encounter, he uses his speed to outrun the train and jumps on it. The second encounter, on the other hand, is just him inexplicably falling from the top of the screen, simply due to the fact that there is no train on the Final Weapon. The other character to have this trait is Dark Mantis, if certain conditions are met in his stage.

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