Playing as Samus, the player must defeat Mother Brain on Tourian, a small stage that appears exclusively in this event. Like her Assist Trophy form, Mother Brain mainly attacks by summoning a swarm of Rinkas around the stage, and she can also shoot her powerful Laser Brain Attack that deals heavy damage on the player. Unlike her Assist Trophy form, she does not disappear until she is defeated by the player. The player has 1 stock and Mother Brain has 200 health points. The trackVs. Ridley plays during the event.
The ranking the player receives is based on how much time the event takes to be completed. The specific conditions for this are listed below.
> 1:03 '33
This is the only event in the game to feature an exclusive stage or boss.
The preview image of this event was changed in Beta 1.2.1 due to Samus receiving new costumes.