Is that you, Minfires Gaming? It's Eevee here. :D
I was stuck in that exam too for a while, but I used an Empress Team, changed my Mystery to Hurricane Jutsu to blind Jiraiya. I c*ually take him out at round 2 and since I blinded him, his attack doesn't reduce the Flower Guard shield. And since Hurricane Jutsu has a pretty low cooldown, I killed Gamabunta before he uses his own jutsu. Hope that helps.