McLeodGaming Wiki
McLeodGaming Wiki
This article is about the character herself. For the event match named after her, see The Mother Brain.
Mother Brain
Mother Brain.png
Metroid symbol.svg
Mother Brain's artwork in Super Smash Bros. Ultimate.
Universe Metroid
First appearance Metroid (1986)
MG appearance(s) Super Smash Flash 2
Species Bio-mechanical supercomputer
Gender Female
Alignment Evil
Company Nintendo

Mother Brain (マザーブレイン) is an organic super computer and a recurring antagonist in the Metroid series. In Super Smash Flash 2, she is an Assist Trophy character and a boss in the event, The Mother Brain.

Character description

Mother Brain resembles a human brain, though she is more spherical in shape. She has short metal spikes protruding from the top of her scalp, and a single large eyeball with an iris colored differently in each game she appears in. The brain is also a bright red. Several power cables come off the bottom of her body, and she appears to be permanently attached to the floor of her tank. Her tank, called the Control Capsule in the Super Metroid comic, is protected by Rinkas.

In Super Smash Flash 2

As an Assist Trophy

Mother Brain
SSF2 Mother Brain.png
Metroid symbol.svg
Mother Brain in Super Smash Flash 2.
Rarity Common

In Super Smash Flash 2, Mother Brain mainly appears as an Assist Trophy, in which she is contained within her Control Capsule. When summoned, she first appears minuscule in size before quickly growing to full size. Once fully grown, she summons Rinkas that bounce and deal 6% flame damage with moderate knockback on contact. Occasionally, her eye will rapidly change colors for about two seconds before firing the Laser Beam Attack, a colorful beam that homes in on nearby opponents and deals multiple hits of 9% damage each (up to 81% damage in total) and weak knockback. Players are also able to stand on her tank, which acts as a platform. She can be attacked, but she has very high durability. When she is defeated, she explodes.

As a boss

Mother Brain
Samus on Tourian.png
Metroid symbol.svg
Samus facing Mother Brain in Tourian.
Health points 200
Stage(s) it appears Tourian

Mother Brain can also be encountered as a boss in event #40, The Mother Brain. In this event, the player must defeat Mother Brain, who has 200 "hit points" (HP), using Samus in the stage Tourian. Mother Brain maintains acts the same as a boss as she does as an Assist Trophy. Additionally, her beams, when reflected at her, will deal immense damage.




  • Mother Brain, Metroid, and Starfy are the only Assist characters that the playable fighters can attack.