One of the trademarks of this line was the Ecto-Plazm cans that came with these toys. Later, Teenage Mutant Ninja Turtles by Playmates followed this with playsets that came with Retromutagen Ooze, which was basically the same toy product. The idea of action figures and gel/slime might be trace back to He-man's toy line, however "Slime" was first sold by Mattel in 1976 as a stand alone toy product.
with Removable Proton Pack
Front of Card Notes
Known as "Slimer" in the TV series "The Real Ghostbusters"
Oozes Ecto-Plazm Play Gel through his mouth (With Removable Proton Pack)
Back of Card Instruction
1. Green Ghost has his own way of helping out The Real Ghostbusters -Ecto-Plazm style! Weapons also rotate.
2. With or without his backpack, Green Ghost is still part of The Real Ghostbusters team!.
Green Ghost, also known as Slimer in the TV series, "The Real Ghostbusters", is now a Gooper Ghost. No matter what kind of trouble he gets into, The Real Ghostbusters are ready to forgive him (...well almost). He comes with his very own backpack with two rotating Nutrona Blasters. And, as the plunder on his backpack is depressed, Ecto-Plazm comes out of his mouth as if he's kissing Ecto-Plazm kisses- That would scare anything away! When he's not helping his friends, the backpack can be removed. Now Green Ghost is really part of the team!
Description from Kenner Action Toy Guide 1988:
Green Ghost loves to give Ecto-Plazm kisses to his hero friends. Fill his backpack with Ecto-Plazm and push the plunger down. Out comes an oozing kiss of goop. a 5 ounce can of purple Ecto-Plazm play gel is included.