Bleach vs Yu Yu Hakusho
Connection:
Both are shonen half-human and half-demon protagonists viewed as delinquent, but have genuinely kind hearts and heroic minds
Both are biologically tied to nearly every species from their separate worlds/dimensions (Ichigo is a human (World of the Living) with a Shinigami father (Soul Society) and he has Hollowfication (Hueco Mundo) & Yusuke is a human (Human World) who is a Spirit Detective (Spirit World) with a demonic ancestral father (Demon World))
Both are the protagonists of highly popular manga series, which influenced the modern day anime community. Both wield famous signature attacks (Getsuga Tensho & Spirit Gun), both of which use spiritual energy in order to fight spiritual monsters
Both were employed by the head authorities of their afterlives to take on monsters (Ichigo as a Soul Reaper & Yusuke as a Spirit Detective)
Both were pulled into a battle for humanity against their will. They were able to unlock their powers thanks to the help of supernatural girl (Rukia & Botan)
Both have a childhood friend who they eventually marry at the end of their series (Orihime & Keiko)
Both are supernatural through heritage. (Ichigo's dad was a Soul Reaper while his mom was a Quincy & Yusuke's ancestor was a demon)
Both possess a form which taps into their demonic heritage and causes them to go berserk (Ichigo's Vasto Lorde form & Yusuke's Mazoku form)
Both prevented the end of their worlds in their stories
Both fought a primary series villain that wanted to cross over to another species to escape their previous limitations (Sōsuke Aizen & Toguro).
Both unknowingly worked for very corrupt organizations that push forward a well-meaning facade (The Soul Society which was built on the 4 Noble Clans & the members of the Zero Squad's assassination of the Soul King. The Spirit World gathering adolescent demons and brainwashing them into monstrous criminals to give the Spirit World a reason to hunt and kill them). Percieved "villains" who were originally part of these organizations and had learnt of these truths additionally tried to warn both of them in prominent battle arcs (Kugo Ginjo, a former half human half spirit Substitute Shinigami & Shinobu Sensui, a former Spirit Detective for the Spirit World who attributed spiritual skills and abilities for himself)
