dude... idiot...
unless you're SUPPOSED to lose against him, or hes near hte end of the game (which hes not, because this is a demo) you DO NOT make him MEGA hard. you should make him DIFFICULT for the average level player. so, decide on a level the player should be by then and then test it out by setting the player level to that in testing and just fighting him...or,i think you can just click 'test battle'...not sure though