Puromi are only found in Ridley's Hideout, where they are confined to a single room containing many breakable pillars and continually rising lava. Each individual consists of a line of eight large, glowing orange spheres which "leap" out of the lava in a low arc, passing unhindered through walls and obstacles and damaging Samus Aran should she come into contact with them. They are impervious to all weapons, although the Screw Attack allows Samus to pass through them without taking damage.
- Puromi bear a strong resemblance to the Polyps of the original Metroid in appearance, habitat, and (somewhat) behavior. It is possible that the two species are somehow related.
- The entities move in a circular motion in groups of eight, similarly to a Luminoth mechanoid known as the Octopede.
- The Puromi themselves seem visually synthetic in nature. They may in fact be artificial beings as well.
- The name "Puromi" is similar to a romanized Japanese word for promise (プロミ puro mi ).
|Non-hostile|| Aurora Unit 217 • Baby • Dachora • Databot • Etecoon • Fleet Admiral Castor Dane • Fleet Mechanic • Pow • Septogg • Tatori • Tatori, Jr. |
Training Drone • Watchdrone • Work Robot
|Hostiles|| Aazelion • Airthorn • Autom • Big Metroid • Cannon • GMX-04 Halberd-class turret (if provoked) • Polyp • Proboscum |
Puromi • Ring Beam Unit • Ripper II • Samus Eater (Bud) • Seed platform • Unfreezable Metroid • ZipNMEBomber
|Misc.|| Bloatsac • Blueroot Tree (Dark) • Butterflies • Chomper Fish • Durable plantform • Fish • Fungus • Glow Stem • Great Tree |
Massive tentacle • Moth • Parasitic fungus • Protozoan • RedGrass • Sandgrass • Sbug • Scarp • Scatterbug • Tallon fern • Mantha