Your panda teacher goes through three distinct stages during the tutorial section of the game. You need to fling Momonga into the staff which he switches between his left and right hands. Hold Momonga in place with the appropriate flipper until the panda switches to the corresponding side. During his wandering stage you'll need to hit him first to cause him to stand still, then quickly hit his staff with another shot. In the final section, he'll flit around randomly, so just keep firing Momonga around the screen as quickly as possible.