H2Ghost (a clever take on the properties of water, H20) are two ghost figures which can each squirt water at a hero figure. To make the one figure become two pull them apart. They become one again by stacking the two eye ghost over the one eyed one.
The H2Ghosts can hold water by immersing them in water and squeezing them in the water. To “attack” a hero figure children would squeeze either ghost to squirt the water. The top ghost with two eyes squirts water from its nostrils. The bottom ghost with one eye squirts water from its eye! When mom and dad bought the first hero figures Kenner didn’t mention if they were waterproof. Although they were meant to get slimed. A little water from H2Ghost couldn’t keep The Real Ghostbusters down.