Territi was the first artificial loomian created by POLUT Corp. to help paint the city, but they went rogue and started vandalising the area. This was POLUT Corp.'s first failure and the first sign of this machine Loomians showing emotions. They later went on to make compactor and were successful.

They probably played with the idea of being a god and started experimenting more. This is probably the time they started to design poochro. The poochro Loomipedia entry states, "It can be found occasionally chasing its tail. Programmers claim that tail chasing is an unexplained anomaly and not part of its task protocol." This was the second sign that these Loomians are much more than machines. They were living beings.

POLUT Corp.'s idea of playing god was far from over, so instead of creating new loomians, they decided to revive fossilised loomians, and the POLUT Underwater Mining Lab is the proof of their success. Not only did they have power over life, but they now even had it over death.

At some point, POLUT Corp. thought about creating a loomian that represented both of their previous accomplishments. This would lead to the creation of the Loomian operaptor. According to the Loomipedia entry for operaptor, "It is a Loomian modelled after ancient creatures."

In the game, we need petroliths, an item used to revive certain Loomians. My theory is that some ancient Loomian petroliths were destroyed or couldn't be found. This is when someone at POLUTS decided to replace the petroliths with robotic parts and revive the Loomian. This Loomian was operaptor.

To further prove my theory, take a look at its body anatomy and compare it to other Loomians created by POLUT Corp. Also, notice how the appendages and body appear less robotic.

Someone or Dr.Vanta probably thought about their failure with territi and stopped the production of Operator, knowing how dangerous it could get if its evolution tyrecks went rouge just like territi. This could also explain why scorb and protogon, which came after operaptor, show more robotic features, probably to show fewer emotions and work like machines rather than living beings. This could also be the reason why operaptor encounters are rare.

All my Loomian Analysis can be found here.