Was gonna say this. The alternative is to let him and to just swap him for his own jungle. Play someone like Lee who ganks better, can duel him fast if he's stupid enough to try, and can just trade his own jungle for nunus. --- Signatures that consist of quotes are bizarre- you could falsify a quote and no one would know.-Jesus
It isn't terribly difficult to stop, you just need teamwork to do it. If your team won't help you ward and go kill him, he has his way. --- Note: All posts come with a giant invisible asterisk stating: "All statements expressed are opinions unless specifically stated otherwise."
Try junglers that can be good at lower levels with lower gold, don't use junglers that need an great amount of gold to be good, junglers that can duel fine, and chase good. I think Lee Sin and Elise are good at dealing with him, also if you want to use an jungler that is weak against Nunu, just ban him and for god sake, don't pick an jungle that is vulnerable to counter-jungle if you are in solo queue.