Ghost Sweeper is only a bit similar to Ecto-500 in that they both can pull a ghost. Between the 500 and Ghost Sweeper, the sweeper looks like a lot more fun. Egon and Ray could have built a modified street sweeper for smaller areas of the city where the other Ectos were too big for. Or for undercover, not so inconspicuous work. Plus they finally have a vehicle to clean up excess ectoplasm!
Any of the hero variants can stand on Ghost Sweeper. One figure drives the vehicle while the other uses the top mounted Nutrona Blaster.
A kid or thirty something helps them by activating the yellow loud speakers. Which spin by moving Ghost Sweeper forward or backwards. Why would they need loud speakers? It wouldn’t only alarm city dwellers, (using my imagination here) but possible ghosts as well. Better tell Screaming Heroes Janine to hold our calls.
When the sweepers are active The Real Ghostbusters can sweep the included Street Creeper ghost into the Ghost Sweeper trap, holding it with other ghosts. ie: Demon Dasher, Galloping Ghoul.