A generator, you rookies really are innovators.
My suggestion is try to disguise it better. Put flashing lights on it, or take off the label. When teams ask you why you're putting gas into your robot, just remind them that they had better get back and refill the magic smoke in their robot too!
Um, actually that looks like an awesome robot. Really solid design, right from 6 wheels up to the nice ball collector. I'm not quite sure how the balls get to the shooter, but I think it has something to do with that generator
.