Technique Name: Self Manifestation
Technique Description: Due to the unique nature of Zetsubō, he's able to fully manifest himself at will and Luke can also summon him at will by calling on him; the way Zetsubō manifests itself is due to Zetsubō taking on the aspects of a doll from his half-bount blood, allowing Zetsubō himself to manifest regardless of whether or not Luke calls for him. when manifesting, Luke's zanpakuto will erupt into black mist and form into Zetsubō's manifested form, this does however leave Luke without the ability to use his zanpakuto as while manifested, it disappears to form Zetsubō so it leaves him without the ability to use zanjutsu, shikai or bankai and if Luke calls on him or forcibly summons him, it requires a lot of spiritual pressure in order to bring him into the physical world due to how strong a shinigami and a zanpakuto must be to reach that point so it reduces Luke by a AR while a active ability.

Before I go any farther into approving this, hybrids of anything, in techs, in spirits, anything, are not permitted. If this is a part of your character it must be fixed. No exceptions.

Well, this is part of Luke's character, although it should be noted that, Luke "CANNOT" use any bount abilities or techs, this simply refers to Zetsubo acting in place of the doll he never had and relates to his orginals as his great, grandfather was a bount, so he possesses dormant bount blood that was never nor will ever be active. So, he's not as much as hybrid as he is simply a Vizard with bount blood inside him. This would allow him to enter bount only places, but that's all it would do, is that understood? ^^

He cannot have Bount Blood inside him, even if he had Bount blood when he was alive. Simply put, because as a Shinigami he is a spirit. There are not traces of him being Bount anymore. Even if there were ways, they are not allowed. This is one thing you need to revamp with Luke for the reboot. Even my Yuki Seika was a Fullbringer in life, but there is no trace of that anymore.

Although I can understand your reasoning, I don't understand why it's a big deal if it gives him no benifit, besides, Whether or not, he's not a normal soul to begin with, he's a cursed soul, which implies he carries on from the original source and also, he has a bount in his family (His great, grandfather as I mentioned before and his sister, which is currently ongoing ^^; ) But the way it's designed, I just have it that Zetsubo is his doll, pretty much and that Zetsubo embodies that, but apart from this one ability, there's nothing else. Besides, it's unknown whether fullbringers who die in life, retain their abilities in the soul society (Although, yes I'm aware that, if a fullbringer dies, all trace of their fullbring goes with that, but there's no reason to let's say, and I'm saying this is purely theoritical, if Yuki had sound and light based fullbring while alive, who's to say that, when as a shinigami, your fullbring returned as your zanpakuto and so, you could reference that your zanpakuto took on the powers you lost in life, but it doesn't make it a fullbring zan, it's just a regular zan that aquired the powers you lost, make sense?)

And, you seem to be mistaken about something; Because of how I'm doing his history, due to his memories thread and others I'll be doing, he never became a bount in the first place, so, it's impossible for him to have been a bount, even throughout living and dying seven other times over the centries, so, please take that into consideration as his bount blood was never "activated" and so, never went on to become a bount in the first place. Like I said, it doesn't make him a hybrid if it does nothing, it's simply a part of him.

This confuses the hell out of me. It's pointless, honestly. Shinigami of Tier 3-1 or higher can manifest their Zanpakuto at will.