The Explorer Robertson is the third episode of Butterfly Valley.
The twins and Bluebell find a journal left byu a fairy explorer named Rob Robertson, who also detailed where treasure could be found. Princess Butterfly accompanies them on their adventure to make sure they are safe; however, as a result, they are followed by some of King Boogieman's troll guards, whom the twins have to repel with a magical blast twice. They find the treasure to be a note, telling them that their adventure was the real treasure. They then go home, and tell everyone about their adventure.
When the Troll gaurds report to King Boogieman that they failed to capture Princess Butterfly, he takes them to a volcano and tosses them into it in a fit of rage.
The scene where King Boggieman threw his servants into the volcano was removed by some stations.