How many movies have Joel Hallikainen and Jorma K. Lehtonen collaborated on?

They have worked on 4 movies together! Their first movie together was Pekko aikamiespojan poikamiesaika (1993) while their highest rated movie together was Pekko ja poika (1994). They have not worked together since Pekko ja muukalainen (1996). They are most known for their comedy films together.