How many movies have Doug Langdale and Kevin Michael Richardson collaborated on?

They have worked on 3 movies together! Their first movie together was Happily N'Ever After (2007) while their highest rated movie together was Scooby-Doo! Legend of the Phantosaur (2011). They have not worked together since Scooby-Doo! Stage Fright (2013). They are most known for their comedy films together.