A Mochtroid is far weaker than any type of Larva Metroid encountered in Samus's previous missions, as its membrane is extremely flaccid and offers poor protection; housed within it is a single minuscule nucleus. Contrary to a Larva Metroid's fangs which are attached to a mass of muscle tissue underneath its numerous and massive nuclei, a Mochtroid's fangs are directly linked to its nucleus without featuring any such tissue in between.
Mochtroids can drain life energy by latching onto their prey like their ordinary counterpart, but they do not possess the powerful grip of the former; as a result, Samus can easily remove a latched Mochtroid with quick movements. She can destroy these failed clones with ease, even without resorting to the Ice Beam or Missiles. This may be the result of the lack of muscle tissue mentioned previously.
Mochtroids were only encountered in a sub-aquatic Space Pirate outpost in Maridia. The reason why the Pirates attempted to clone the Baby when they had the resources to multiply it with beta rays is never revealed, though it is possible they did this simply as a way of producing more Metroids. This method could've been quickly dropped as the result of the Mochtroids being significantly weaker, explaining why they are only found in one area.
Hologram Mochtroids, or something extremely similar, are encountered in Samus' holographic training arenas. They have the ability to teleport very short distances to avoid attacks. They, along with hologram Tallon Metroids, are present as targets in the Regulator and Survivor training modes.
- It is unknown why Mochtroids were only encountered in Maridia. There are, however, a couple of possible explanations: these creatures were either 'dumped' in Maridia when they were deemed failures, or the purpose of their creation was to test their performance in aquatic operations that other types of Metroids may not have been able to.
- Considering their crippling defeats during the Phazon crisis, the loss of one of their homeworlds, along with the eradication of Metroids on SR388, the Pirates were possibly forced into a last stand scenario; naturally, they would want to make as many Metroids as possible in a shorter amount of time, thus explaining their reason for creating Metroids through cloning and beta ray exposure.
- Their holographic appearance in First Hunt is peculiar, as the actual Mochtroids that the holograms are seemingly based on would only come into existence years later in the series' chronology during Super Metroid's events.
- The Super Metroid Nintendo Player's Guide suggests Mochtroids are young Metroids that never matured. Mochtroids may be a mutated stage found between Infant Metroids and Larval Metroids.
- Some Metroids featured in Samus and Joey as a flashback are erroneously featured with a single nucleus, making them slightly resemble Mochtroids. 
- Their name is a pun on the word "mock-up", making them "mock Metroids".
- Their appearance is somewhat similar to a Phazon Metroid, as they have similarly shaped bodies and talons.
- Mochtroids are mentioned in the Metroid Trophy description in Super Smash Bros. Melee: "Mochtroids, which look like Metroids, are weaker, with fewer internal nuclei.".
- Mochtroids are extremely vulnerable to the Grapple Beam, as a single Grapple Beam shot can kill it. Although it is unclear as to why, a possible explanation would be that their weak membranes are vulnerable to electricity or physical stress.
Super Metroid manualEdit
"Mochtroids are the Space Pirates' first attempt at Metroid clones. These creatures, unlike the real Metroids, are easy to defeat."
"These small Metroids didn't make it to maturity."