Together with the Slit Experiment, entanglement has been a thorn in the side of Quantum Mechanics ever since this peculiar behavior of invisible matter was discovered. According to Quantum Mechanics, entanglement is the instantaneous influence one particle has on another irrespective of distance.
Of course, this phenomenon cannot be explained with discrete particles. The proponent is attempting to do action-at-a-distance without a mediator. This is no different than introducing spirits into the intermediate space. The physical mechanism ends up being black magic.
The following video illustrates the insurmountable difficulties Quantum theorists encounter when trying to simulate invisible micro world mechanisms with corpuscles.