Mostly because they can come across as a bit absurd. A prime example is an old Fantastic Four enemy: the Red Ghost and his Super-Apes. Yes, the name might sound a bit silly, but they can be ...

In the original Pac-Man (released in October 1980 as an arcade game in Japan), the ghosts, also known as the "Ghost Gang," each had unique AI traits that contributed to the game's enduring appeal.