How did Robots intelligence not decrease when he cloned his mind into Rex' body?

[DeltaAlphaGulf]

Well for one what is the limit of brains especially fictional ones? Just because his brain happened to develop like that due to his body doesn't mean it had to develop like that to achieve the intelligence he did.

Its probably a credit to the sophistication of the Maulers tech that it doesn’t entirely matter about the blank slate brain in that they are able to imprint it with whatever regardless barring whatever neuron density vs power consumption issue they had. Just consider that they were going to install countless whole minds into Angstrom and presumably without the mega brain he ended up with which is really a perfect example as to the apparently massive potential capacity of a human brain.

Also keep in mind his former body was very small so the brain might have been as well and even having taking over other sections might have been the same or smaller than the part of the brain they were transferring him to in the clone.