With Sun and Moon coming soon, I got on the Fake Pokemon bandwagon. Here are two I made up.
Thinking high special attack, overall decent defenses and low speed
Important moves: thunderbolt, calm mind, psychic/psyshock, shadow ball, dark pulse, magic coat, grass knot
Based off neurons and the central nervous system, I tried for a design that wasn't creepy but you could still tell it was supposed to resemble a brain, etc.