Toughy, I'd wager the 4th would win.

I think its pain bro

Pain,until he injures some of narutos friend in front of naruto.otherwise naruto.

4ths jutsu is gonna take pain out bt wit d renigan he can do unexpected tings,since he kud do away wit ero sennin i bet he kud b a match wit d 4th bt d winner is nt certain dey ar both students of d gr8 gama sennin jiraiya-sama

There is nothing lik it is not cetain it is cool pain wil take the 4th but the battle wil take long until then