It was one of those things that would have made me even more scared of Gengar as a child, and terrified of one of the Pokemon I always tried to have in my party (Clefable). I'm so glad it didn't occur to me!

On that note, I feel incredibly sorry for Yamask and most of the other "creepy" pokemon. I think Ninjask and Gengar were the only one I didn't feel some sort of sympathy for.