Barbie Dreamhouse Adventures Season 4 Episode 2 Magical Mermaid Mystery Part 2 Episode Title: Magical Mermaid Mystery Part 2 Episode Description: After her boss is fired, Barbie is promoted with new responsibilities. Unfortunately, she learns that one of those responsibilities is that she has to fire Ken. Meanwhile, Skipper and Stacie join Chelsea on a quest to find a missing mermaid, but end up getting lost. Trey digs a tunnel to the Dreamhouse and the Roberts' pets, having found a way out of their house, give Trey and his goons a good scare. Barbie, finding them hard to handle without keeping an eye on them, takes the naughty pups with her to work.