This is awesome and exactly the sort of useless but valuable study I come here for. Good job.

Also, I think you should analyze the frequency of color choices when Mario is the first word or not the first word of the title. I want to see whether M is red for "Super Mario X", "Mario X", or "Other Other Mario Other Other". I imagine it might be tempting to make the very first letter red, or maybe make the first "big" letter red.