Butterfly Bullet Bombing from BM Chōji should be much stronger than the fuuton attack Shukaku used against Bunta in part 1. Despite the fact that Bunta "tanked" it for some readers, he took heavy damage, so he's in for a rough time against an opoonent who tussled against the Gedo Mazō. Bunta's suitons won't be much of a factor, and his oil is only useful if he can light it on fire, which (by himself) he cannot. Nikudan Sensha can force Bunta to hop back, and several punches would do heavy damage. The only way Bunta can inflict damage is using his sword, but I don't see him winning this matchup at all.