that newfangled human...

isn't that new human's ''all fiction'' thingy the same as orihime's reject ability...?

No, because Orihime's can actually reject physical mass locally, while Kumagawa's All Fiction only rejects non-material things universally.

ah, ok. similar idea though. so he can't say that ''it is fiction'' if i club him over the head with my zanpakuto?

that vizord reminds me of a certain naruto character... btw the metal dome can be broken out of right? would a cero do it? also, if that guy can turn into metal sand, would the heat or electricity do damage ?

Electricity - no

Fire/heat/plasma - definitely.

"All Fiction" can turn the fact that he has been injured into fiction, healing his wounds.

[Note: This is a much weaker version of the real "All Fiction" from Medaka Box. The character who used this was beaten for one of two reasons:
1. He liked to lose, which is why he was called "the good loser".
2. Someone hit him with something that he could not directly erase. For example, someone tricked his brain into thinking that he was covered with bruises, so his body systems shut down for a little bit. There were no actual injuries he could erase, so he couldn't do anything except erase his own mortality.

P.S. Be thankful this isn't exactly the same as in Medaka Box. Be VERY, VERY thankful.]

death does not make sense to counter. or unconsciousness for that matter. so you have to kill him in one hit? would your metal sand guy's poison work?

Poison would work, as he can't actually erase the poison. [Note: this guy is meant as a small counter to Charles ]

on the metal guy, any extreme source of heat? how about lasers?

A cero/laser might to something, depending on the strength/reiatsu value. Now, extreme sources of heat such as plasma would probably do the trick. Lightning, however, would also do something, although it woulnd't be as effective.