Luffy from One Piece is also a common pairing. Luffy's carefree and adventurous nature combined with Ichigo's more serious and duty - bound personality would lead to some really fun and unpredictable interactions. They could be on a quest in a crossover world, with Luffy's devil fruit powers and Ichigo's Soul Reaper abilities working together in strange and amazing ways.
Another concept might be Ichigo crossing over with superheroes from Western comics. Picture Ichigo fighting alongside Superman or Batman. His unique reiatsu - based powers would be a great contrast to the superhuman abilities of the superheroes, and they could learn from each other's fighting styles.
One interesting character to crossover with Ichigo is Light Yagami from Death Note. The clash between Ichigo, who is a protector, and Light, who is a morally ambiguous character with the power to kill, would be very engaging. Saitama from One - Punch Man could also be a great choice. Saitama's overpowered nature and Ichigo's journey to become stronger would make for an interesting story. And what about Alucard from Hellsing? His vampire powers and Ichigo's powers related to the afterlife would create a really dark and exciting crossover.
The main appeal of 'godlike ichigo crossover fanfic' is the power fantasies. Seeing Ichigo with godlike abilities in different universes or interacting with diverse characters is exciting. It allows fans to explore 'what if' scenarios.
One interesting Ichigo crossover One Piece fanfic is 'Bleach and Pirates: A Strange Alliance'. It combines the unique powers of Ichigo from Bleach with the adventurous world of One Piece in a really engaging way.
One unique feature is the combination of different power systems. You have the spiritual powers from Bleach like Ichigo's Zanpakuto and Rukia's Soul Reaper abilities, and then you have the diverse powers of Pokemon. For example, a Pokemon's electric attack might interact in an unexpected way with Ichigo's Getsuga Tensho.
Ichigo could meet Frodo Baggins. Frodo, being from a very different kind of world, would find Ichigo's situation strange. But they could bond over their shared sense of being out of place in some ways. Frodo could teach Ichigo about the importance of perseverance in the face of great odds, and Ichigo could protect Frodo from any potential threats in this crossover world with his swordsmanship.
One possible plot could be that Ichigo, from the Bleach universe, accidentally stumbles into the world where fem Oga (presumably from Beelzebub) exists. They initially misunderstand each other's powers and motives. As they get to know each other, they team up to face a common enemy that is threatening both of their worlds. Maybe this enemy is a powerful demon who wants to absorb Ichigo's soul reaper powers and use Oga's connection to Beelzebub for its own evil plans.
Inoue Orihime from Bleach itself could be a part of the harem. Since she already has feelings for Ichigo in the original series, it would be a natural fit. Also, Saber from Fate/Stay Night. Her noble and powerful nature would contrast well with Ichigo's more rough - around - the - edges style. Another could be Rem from Re:Zero. Her loyalty and love - stricken nature could add an interesting dynamic to the harem as she falls for Ichigo.
One idea could be Ichigo getting transported to different anime universes where he meets various female characters who are instantly attracted to his unique powers and sense of justice. For example, he could end up in the Naruto universe and meet Hinata, and she might be intrigued by his ability to see spirits. Another could be in the One Piece world, where Nami sees Ichigo as a potential ally against powerful enemies. The harem aspect would develop as these characters start to compete for Ichigo's attention in different ways.