How many movies have Bob Ivy and Michael Sonye collaborated on?

They have worked on 4 movies together! Their first movie together was The Tomb (1986) while their highest rated movie together was Sorority Babes in the Slimeball Bowl-O-Rama (1988). They have not worked together since Sorority Babes in the Slimeball Bowl-O-Rama (1988). They are most known for their horror films together.