some villain of Batman: the Brave and the bold, Picked on at school for being in choir, he finds that he can control people's minds using his singing voice, resulting in possibly the greatest Musical Episode of anything ever. Played by Neil Patrick Harris.
It's not hypnotism, it's mind control with singing Aker, no one in the show could resist it, he took over everyone on the planet except Batman because he has Bat gadgets for every situation ;hello;