Dr. Valentine

Dr. Valentine is a cruel doctor who is revealed to be the head of the NIMH corporation and the secondary antagonist in The Secret of NIMH 2: Timmy to the Rescue. He originally used Martin for one of his neurological experiments and brainwashed him to insanity. It wasn't until Timmy made it to NIMH that Martin brainwashed him and made Valentine think that he was a dog. He was introduced as the main antagonist of the film due to his actions and evil personality, but this was a misinformation campaign, as his actions created the true main villain.

Trivia

 * He was voiced by Steve Mackall.
 * He is at first thought to be the main antagonist, until Martin would take this role, moving Dr. Valentine's role to secondary.
 * It is unclear if Dr. Valentine is the original scientist who created the Rats of NIHM or what the nature of his research was for (possible medical study, zoology study, biological warfare, black marketing, etc.)
 * If Dr. Valentine injected Martin Brisby with the same drugs he experimented with on the Rats of NIMH, then Martin's insanity is partial proof that the NIHM performance enhancer does indeed have a small percent chance of causing its animal patients to exhibit aggressive and violent tendencies as well as a disregard for others.
 * This would then prove that Jenner was most likely effected by this same percentage and logic.