This card needs to be errata'd. On the printed version, it displays a (Star) Boost icon without any accompanying text to explain its effect. .

I reached out to FFG. the reply e-mail said this "The star icon on Tweedledope was a mistake; it should instead be a single boost icon. Please treat it as such when you play." Hopefully this helps anyone who is looking for the answer to why this has a boost. Edit. Thanks to the site for adding a "boost" icon to this card so that all the people with the mistake can view the real text.