I'd say you can substitute pilsen malt for 2-row pale ale malt in many styles if you really wanted to. Though I'm not sure why you'd want to. In general, it will result in a lighter colored beer and probably cleaner. On the other hand, you'll want to account for differences in extract potential, diastatic power, and boil 90 minutes instead of 60 in order to drive off DMS precursors.
If you're just looking for a style, I'd say a summer ale or wit.