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Ridley is a playable character in the fighting video game, M.U.G.E.N Trilogy. He was confirmed along with many other characters who appear in Super Smash Bros. Ultimate on December 14, 2018.


Ridley, also known by the identifier Geoform 187, is one of the main antagonists of the Metroid series, the other being Mother Brain. In spite of his bestial appearance and fearsome mannerisms, he is by no means a mindless animal, but a high-ranking Space Pirate general that is sapient and, as shown in the comics, capable of speech.

Ridley is directly connected to Samus Aran's past and present. In the Metroid e-manga, he gained enough favor with the Space Pirates that he became one of their figures of highest authority. As such, he attacked and devastated three-year-old Samus's homeworld of K-2L in a raid for fuel and resources, and personally killed Samus's mother when she jumped in to protect her daughter. Unwittingly, he created his own worst enemy in Samus through this.

In Metroid and Metroid: Zero Mission, he appears as the military leader of the Space Pirates and as a boss in the area with his name, and in Zero Mission, the final boss is a robot in his likeness. He, his counterpart Kraid, and all the Space Pirates desired to capture and clone the eponymous Metroid creatures for use in galactic domination. Ridley, however, was surprised to find the little girl from years ago, now a grown woman, having come to fight and kill him.

How to Unlock

Use Ridley's Super Smash Bros. amiibo or scan Ridley's AR Icon from the M.U.G.E.N Trilogy website.

Assist Attacks

Set Name Cross-Over
α Plasma Breath Plasma Lavaburst
β Space Pirate Rush
γ Wing Blitz Hyper Wing Blitz