Ghosts (Pac-Man)

Blinky, Inky, Pinky, and Clyde, the latter of whom was once called Sue, are the main antagonists of the Pac-Man series, having appeared in almost every Pac-Man game and related media since then. Their job is to chase down Pac-Man, instantly killing him upon contact. The only way Pac-Man could combat them was to eat a giant blue dot, which would turn them blue and allow Pac-Man to eat them, though they could not die they were banished back to the center for a few seconds.

In Super Smash Bros. 3DS/Wii U
The ghosts are set to appear in Super Smash Bros. 3DS/Wii U as part of Pac-Man's moveset. How they are used is unknown.