So Snow White Barbie was riding in a Transformer dump truck...
In literature, sometimes the most compelling partnerships are the ones that seem mismatched. Think The Da Vinci Code--dead bodies among some of the most precious, highly protected art in the world. Or Christopher Fowler's detectives, Bryant & May--Bryant dabbling in the strange and the occult to solve crimes, May following logic, reasoning, and more traditional methods. Or even Holmes and Watson--their talents certainly complemented each other, but they were very different in character and approach.
My husband and I watched a new show the other night--'The Good Guys' with Tom Hanks' son, Colin Hanks, and Bradley Whitford of 'The West Wing' fame. In summary, an old-school, drunk of a cop (Whitford) gets young, preppy (Hanks) into crazy action to solve petty crimes-that-turn-big. The villains were comical when need-be, the storyline was interesting, and the conflict between the detectives was definitely ON.
You may not have a team of detectives at the helm of your book, but you probably have two characters who interact and conflict. Did you intentionally make them alike or very, very different? Do you count on strange combinations like Snow White Barbie and Transformer Dump Truck to entice your readers?
*Sorry, I couldn't find a picture of my son't Transformer dump truck. The above is a substitution, Optimus Prime Battle Blaster. I know you all care about accuracy. :)