Read it and Weep
The Monster Squad (1987)
Whenever a great evil was unleashed in the 80s, it seemed the only way to stop them was a rag-tag group of children. The Monster Squad is about one such crisis.
The squad is a group of kids who are obsessed with the Universal Monsters(tm). Wouldn't you know it, those monsters turn out to be real and the only thing standing between them and world domination would be somebody with an intricate knowledge of their franchises. And a virgin. And a holocaust survivor. That last part is kinda weird.
Thanks to Paul for thoroughly researching his favorite childhood movies and settling on this one! It's getting nice and spooky up in here!