After seeing the video I could imagine a "frolge hurlicane" because Fishlicka said that he could have a lot more of the frolgs on the screen at once. 

So the "king frolg" or "prince frolg" could have a crown that produces the frolg hurlicane and you have to knock the crown off to stop the attack of the mini-boss. Of course if you defeat the mini-boss but not knock the crown off, you can pick it up afterwards to have two little frolgs circle around you when you wear it.