You can do this by creating custom titles in Motion and the applying them in FCP X. If you're not sure how to to it, you can check out my tutorial here:
Motion Quick Tip: Custom Titles for FCP X
It doesn't address the specific animation you're talking about, but there are text behaviors inside Motion that will animate tracking or scale or individual letter position. Once you have the animation working in Motion, then you can save it as a reusable title template in FCPX.
Andy
http://www.timesavertutorials.com