Super Duper Spy Kit is a children's toy set that provides them with clothes and equipment allegedly used by a spy.
Slimer won a free Super Duper Spy Kit when he mailed in 100 coupons from 100 Freaky Flakes cereal boxes. A tape recorder in the kit declared Slimer was spy and ordered him to protect the world from evil. Slimer dressed up in a trenchcoat, hat, and gag glasses. The kit's spy ring provided him with a range of tools, such as a periscope, a robot kitten, a giant bone, and a deflector dish.
- On page 20 of Ghostbusters Volume 2 Issue #13, the Super Duper Spy Kit ad on Freaky Flakes makes a non-canon cameo left of Dana Barrett.
- On page 12 of Ghostbusters Volume 2 Issue #14, the the Super Duper Spy Kit is present in the kitchen again.