User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-28303251-20130413022927/@comment-1712810-20130413025531

Actually you don't need to charge, just press... I think A&X at the same time to perform an upward strike while standing still to perform an upward attack (on the Wii Classic Controller Pro anyway), then shell away. Not sure if that'll do it, but it might be worth a shot.