Whoops, I misread your post. Sorry. >.< But let's not forget Inuyasha has the Mediou (I think) that can send his opponents to Hell. I'd like to see Trunks escape that. And I'm not sure Inuyasha could beat Kenpachi. Kenny is more demonic in nature than Inuyasha and he has massive amounts of crazy power.
Do you smoke crack? Goku escaped from hell after wrestling two buff germans. Trunks would shout a hole in dimensions. Plus, Inuyasha would have to hit Trunks to do that, and I would love to see Inuyasha hit someone millions of times faster than light. Plus, Inuyasha would vaporize Kenny. Anyways, Trunks crushes them all into an orb, rolls them all into a dough, and eats them on top of a huge chicken pot pie. He does all this when he's eight years old and in base form btw.
I don't think he'd even get that far. Kenny has incredible durability, but he DOES have a finite supply of energy, and he HAS been killed EASILY by Unohana. I don't think he would last long if Kisame used that water bubble and Samehada fusion thing. He would most likely get killed by Kisame, but if he somehow didn't, Zoro would finish him off in an instant.