Stinky is not one of the names of the ghosts in the arcade game "Pac-Man. The four ghost is called Clyde.

Blinky, Pinky, Inky and Clyde are the primary group of fictional ghosts who serve as the main antagonists in the Pac-Man franchise. Several different ghosts have appeared throughout the franchise, aside from the ones in the main aforementioned group.

Blinky, whose original name is listed as Shadow, is a red ghost who, in the original arcade game, follows behind Pac-Man. He is considered the leader of the ghosts. Pinky, whose original name is listed as Speedy, is a pink ghost who, in the original arcade game, positions itself in front of Pac-Man. Inky, whose original name is listed as Bashful, is a cyan ghost who, in the original arcade game, has a fickle mood. He can be unpredictable. Clyde, whose original name is listed as Pokey, is an orange ghost who, in the original arcade game, acts stupid. He will chase after Pac-Man in Blinky's manner.

More Info: en.wikipedia.org