What Tsumiki did feels an awful lot like cheating to me. Yeah, it's a competition of genjin powers against genjin powers, but it seems pretty clear from the context that, in spirit if nothing else, that idea of the competition is to use genjin powers on the ball. Tsumiki used an electrical charge from the class president to sabotage the spider girl's webs directly, which seems like foul play even discounting that the genjin power she used was technically from an uninvolved third party who wasn't playing in the game.
Anyway, if I was a referee for this game I'd be calling a fault on wolf girl and her co-conspirators, but that's just me. Enjoy your bullshit cheater trophy, I guess.