How many movies have Koen Burssens and Olaf Janssens collaborated on?

They have worked on 5 movies together! Their first movie together was Plop and the Violin Adventure (2005) while their highest rated movie together was Plop en de Kabouter Paashaas (2010). They have not worked together since Plop Becomes Gnome King (2012). They are most known for their adventure films together.