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Split Mushroom

From Mega Man Wiki
Maverick Info
MMX4 - Split Mushroom Art.png
Artwork from Mega Man X4.
Stage portrait(s).
General information
Name(s):Split Mushroom
Title(s):Little Demon of the Wasteland,[1] Little Devil of the Ruins[2]
Appearances:Mega Man X4
Game Info
Weapon(s):X4 Soul Body
X4 Kuuenbu + Kuuenzan
Weakness(es):X4 Lightning Web
X4 Raijingeki
Stage(s):Bio Laboratory
Voice (JP):Mari Maruta

Split Mushroom (スプリット・マシュラーム) is a Maverick from the X era, appearing as one of the main bosses in Mega Man X4. He is a clone-themed Reploid based on a mushroom, who attacks with clones of himself and dangerous spores. He is a decommissioned lab tech Reploid who was revived by Sigma.

In the Games

Mega Man X4

Sprite from Mega Man X4.

Split Mushroom debuts in Mega Man X4 as one of the eight Mavericks on the Stage Select screen. He serves as the boss of the Bio Laboratory stage. The game's Japanese manual states he was made to manage a biological laboratory, and was supposed to be decommissioned when his lab was closed, but Sigma reactivated him as the facility's mischievous guardian.[3]

Split Mushroom alternates between two attack patterns: launching light clones at the player, or running formations with an identical clone. Defeating Split Mushroom grants Soul Body to X, and Kuenbu and Kuenzan to Zero. His weakness is Lightning Web or Raijingeki from Web Spider, which fries him and resets his pattern. A boss attack rematch with Split Mushroom later occurs in Final Weapon 3.

Mega Man X DiVE

In Mega Man X DiVE, Maverick Data of Split Mushroom appears as a boss in Chapter 14 in Co-op Mode, being fought in Energen Crystal 14-2.

Other Game Appearances

Other Media

  • In the Rockman X4 manga, Split Mushroom reprises his role from Mega Man X4.
  • In the Archie Mega Man comic, Split Mushroom appears in the "Worlds Unite" arc as one of the Mavericks resurrected in Sigma's army.

Official Data

Source Data
Mega Man X4 He occupies the laboratory and will attack whoever visits there.
Rockman X4 manual
Rockman X4 website[4]
A Reploid made to manage bio laboratories. He was supposed to have been disposed of when the lab was abandoned, but someone brought him back to life. At the same time as the coup, he converted his lab into a fortress and attacked intruders just for fun.[JP]
Comic BomBom Special #116: Rockman X4 Saikyou Daizukan ...[JP]
Televi Magazine Great Hyakka #103: Rockman X4 Himitsu Daizukan ...[JP]
Compendium of Rockman X Boss File Split Mushroom resembles a mushroom and is the one beyond the spiral staircase. He attacks with unique techniques such as deploying clones and spreading spores.[JP]
Mega Man X Legacy Collection Gallery When his laboratory was shut down, Split Mushroom was decommissioned, but someone has resurrected him to fortify the lab and aid Repliforce's coup. He has the cruel, playful nature of a child, and sees the destruction of intruders as the best game of all.
Mega Man X DiVE Dubbed "the Little Devil of the Ruins", Split Mushroom was once the administrator of a Bio Laboratory but when the facility was shut down, he was decommissioned as a result. Split Mushroom was later resurrected by Sigma as a Maverick to reclaim control of the Lab. He would attack whoever entered the lab of fun and as a result, drawn the attention of the Maverick Hunter.[sic]


Behind the Scenes


Language Name Origin
Japanese Split Mushroom (スプリット・マシュラーム) "Split" refers to his ability to split himself into clones.


  1. MM25: Mega Man & Mega Man X Official Complete Works. 2013.
  2. Mega Man X DiVE. 2020.
  3. Game manual, Rockman X4. August 1997.
  4. (Archived) Capcom Japan official website, New Products, Rockman X4. 2000. (