Psycho Mantis is definitively, 100% percent forever, my favorite video game villain. In Metal Gear Solid for the PS1, I found myself astounded every time he predicted something new about me, the player, not Solid Snake. Even though I know now that it was just reading the memory card, the way he was breaking the fourth wall was something that I didn't think was possible.
And having to plug your controller into the other port in order to properly defeat him because for some reason he couldn't read the right side of your brain... or something... I don't remember the exact reasoning. But it was so, so, so, cool. It blew my mind.
It literally blew my mind, I have no mind. It's gone.
Thanks again @VinMcCarthy for taking me down Video Game Memory lane.