How many movies have Tiffany J. Shuttleworth and Walter P. Martishius collaborated on?

They have worked on 7 movies together! Their first movie together was Barbie of Swan Lake (2003) while their highest rated movie together was Barbie in A Mermaid Tale (2010). They have not worked together since Barbie in A Mermaid Tale (2010). They are most known for their family films together.