Little Dracula .This toy line from Bandai was based on a short lived cartoon that aired on Fox from September 1991 to October 1991 for a total of 6 episodes .The failure of the show pretty much doomed these toys at retail and for the most part they went from case to clearance bin completely skipping the toy aisle.
Toonsylvania. Produced by Toy Island and based on another short lived cartoon that aired on fox in 1998.At the same time these toy hit the store shelves Burger King was giving away Toonsylvania toys with their kids meals and 2 years after the show was canceled a game for the Gameboy color was released.
Aaahh!!! Real Monsters .This toy line from 1995 by Mattel was based on the cartoon that aired on Nickelodeon for years.Of the 12 toys in this line only 4 appeared on the show, The other 8 where rehashed from a toy line that never made it to production.Besides this toy line the cartoon spawned ton's of other merchandise ranging from trading cards to chewing gum .
Bump in the Night .These are based on a show that aired on ABC off and on from 1993 to 1995 .I haven't a clue who made the toy line but I do know they came in 3 sizes (these being the large 13 inch set) and Subway gave away pvc toys in their kids meals.
Monster Force.Made by Playmates and based on the 1993 cartoon that ran 13 episodes on USA network.This line wasn't incredibly rare but didn't sell very well at the time and is probably more well know than some of the other line I have listed above.
Big Frank.Made by Playskool in 1993.No cartoon needed for this one he is just pure awesome