>>37295834I think he is refering to the swallowtail caterpillar having marking that resemble eyes even though, unlike its real life counterpart, there is no evidence in any form of pokemon media that caterpie's eyes are supposed to be fake.
regardless, the presense of fake eyes on some swallowtail wings is already subtle enough(far more than the larvae) and to claim that butterfree has intentional fake eyes on its design is a huge reach. Its not an arbok or masquerain situation.