mostly pils. some breweries do use a pinch of wheat and some probably use some munich or kolsch malt.
Gaffel uses a pinch of Wheat and might be one of my favorites. According to a book I have on Kolsch style, however, wheat is not considered "normal" for the style.
I still like it
i feel like ray daniels mentions that same point, but then goes on to describe how frequently it was used amongst second round finalists. it may not be "true to style", but it must certainly make a good one!