Drop a Vileplume and you screw up SPs anyway. Messing up other trainers is just a perk. And Vileplume is not that expensive either - somewhere around only $10, last time I checked.@DarkPkmnTrainer, that's basically right. You can run four Pokemon Catcher for under $20, or one Luxray GL Lv. X with the exact same effect that can be powersprayed for the cost of a mere $60!