|“||Etecoons and Dachoras. I've met these intelligent beings before. They seemed to recognize me, as well. How unusual to meet again here. In the past, they've helped me unleash abilities I didn't know I had. But where did they run to? I hope they're safe...||„|
In Super Metroid, these rather intelligent mammals taught Samus how to Wall Jump to reach greater heights. When Samus enters their room, they sing the Item Acquisition Fanfare, before teaching Samus the Wall Jump.
Later in the game, they are trapped along with the Dachora in the Torizo's chamber, which is now being flooded with scalding-hot lava. Samus is able to save them by shooting out the wall so they can escape, and they flee Zebes using a spacecraft.
The Etecoons and Dachoras appear again in Metroid Fusion, on board the Biologic Space Laboratories research station as the sole survivors of the X Parasite infestation. They are found on the Habitation Deck, confined in a sealed, tropical themed area with hanging tires for the Etecoons to play on. It is unknown why these creatures were on board, or why the X did not target them as potential hosts, though Adam suggests the creatures had no useful capabilities for the X. After Samus releases them, the Etecoons and Dachoras went to Samus's Gunship, and they later save Samus from the space station's explosion after the defeat of the Omega Metroid by piloting her gunship into the room to rescue her.
Whether the Dachoras and Etecoons will appear in Metroid Dread is unknown, as they have not yet been mentioned or seen.
Though Etecoons do not appear in the game, files are present for an unused Logbook entry for a similar creature called an Endocoon. It is described as a cute, non-threatening mammal in the Logbook, which matches the description of the Etecoon. No models, textures or scripts exist for it in the game's internal files, but the room Xenoresearch Lab, on the G.F.S. Olympus, is internally named "04_gfship_endocoonlab", presumably indicating they were to appear there. The room's counterpart, on the G.F.S. Valhalla, is correspondingly named "04_abandoned_endocoon".
|Color||HP||ATK||E||BE||M||SM||PB||Brinstar. The Etecoons will show you how to do the Wall Jump. They're friendly.|
- C. JUMP LIKE THE ETECOONS (pg. 49)
- "These three little guys will show you the Triangle Jump technique. You can jump back and forth off of the walls as you go up the long shaft."
Unused Metroid Prime 3: Corruption Logbook entry
Threat level low. Fond of machinery. Widely considered to be cute.
Endocoons are a semisentient species of mammal known for their playful demeanor. They are particularly fond of machines, perhaps drawn by the hum of an engine or the shine of metal. Unfortunately, their inquisitive nature can be quite disruptive, especially when fine machinery is involved.
Super Metroid Developer Interview
Akinori Sao: Yamamoto-san, what part of Super Metroid do you recommend?
Yamamoto: This is a bit detailed, but after you beat the last boss, Mother Brain, Samus escapes, right? The planet is beginning to explode, so you really have to hustle. But at a certain spot, there's a Dachora and some Etecoons…
Sakamoto: Dachoras and Etecoons are alien creatures who teach Samus new moves, and they've gotten trapped while trying to evacuate.
Sao: If you help them, the ending changes. Is that right?
Sakamoto: The ending doesn't exactly change, but when the planet explodes and Samus just barely clears the blast in her ship, out to the side you can see…
Yamamoto: The Dachora and Etecoons escape, too.
Sakamoto: About one dot of light shoots out from the exploding planet! (laughs)
Sao:(laughs) You understand from that one dot of light that they survived.
Sakamoto: I tried it myself, and the dot was so small I could barely see it! (laughs)
Sao: Is that because it was an old tube TV?
Sakamoto: Yes. With the high resolution screens today, you should be able to see it clearly. I hope people will check that out for themselves.
Yamamoto: There may also be people who played Super Metroid before who don't know about that. I hope they will play the game again and help those creatures! 
- Although it is stated in Metroid Fusion that the Etecoons teach Samus to Wall Jump, she has this ability in Metroid: Zero Mission, Metroid Prime 2: Echoes, Metroid Prime 3: Corruption and Metroid: Samus Returns, all of which chronologically happen before Samus first encounters the Etecoons in Super Metroid.
- In concept storyboards, it says there are four Etecoons. However, only three are ever shown in both Super Metroid and Metroid Fusion.
- The Etecoons' in-game sprites are a greenish color in Super Metroid, but are depicted blue in artwork. Fusion consistently depicts them as blue.
- Yasuhiko Fujii stated that the idea of saving the Dachoras and Etecoons was conceptualized by another programmer on the game, but did not say who that was.
- An Etecoon appears as a stuffed toy in Samus & Joey.
- ^ Super Metroid Nintendo Player's Guide
- ^ https://www.nintendo.com/super-nes-classic/interview-super-metroid
- ^ "That was something a different programmer came up with on his own. And if you save them, when the planet explodes there’s some extra graphics showing them successfully escape too." http://shmuplations.com/yasuhikofujii/
|SR388||Baby • Flitt • Proboscum • Septogg|
|Zebes||Dachora • Etecoon • Powamp • Shaktool • Suspensor platform • Tatori • Tatori, Jr. • Tripper|
|BOTTLE SHIP||Pow • Wadge • Zuru|
|Features of Samus Aran's Gunship|
|Personal||Adam's helmet • Chozo biotech computer • Data records • Logbook • Mii Bobblehead • Samus Screen • Ship Bumper Stickers • In the Cockpit • Music player|
|Armaments||Plasma Beam • Power Beam • Ship Grapple Beam • Ship Missile Launcher • Gunship Multiball • Bunker-Busting Annihilator • Gunship|
|Mission features||Auto-repair function • Biohazard scanner • Blast Shield • Bombing Run • Command Visor • Commander Adam Malkovich • Cryostasis • Escape Pod |
Heads-Up Display • Helm controls • Landing Gear Legs • Microfactories
Missile Station • Recharge Station • Save Station • Tetra Galaxy Scan Screen • Transmission console • B-Unit
|Cargo||Theronian Bomb (1st piece • 2nd piece • 3rd piece) • Colossal War Golem|
|Passengers||Baby • Anthony Higgs • Dr. Madeline Bergman • Commander Adam Malkovich (computerized) • Dachoras • Etecoons|
|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