Most Information and Bio pictures are from Xbox360Achievements.org and its posters xRogue 5x and Fizzmatix. Original thread can be found at this location.
Most Wanted Ghosts are special ghosts that appear in the online version of Ghostbusters: The Video Game for the Xbox 360 and PlayStation 3. They appear when certain objectives are made. Interestingly enough, all of them are variants of ghosts that appear in the regular game.