Well, perhaps the plot could involve Ichigo being a nobody in a crossover world where he has to learn new powers. Since he's a nobody, no one believes in his abilities at first. But as he discovers his new environment, he starts to unlock hidden powers within himself that are unique to this crossover situation. This could lead to him becoming a key figure in saving the new world he's in from a great threat.
In this 'ichigo is a nobody crossover fanfiction', the plot might be centered around Ichigo's struggle with his new status. He could be in a world full of different factions from various fandoms. As a nobody, he is at the bottom of the social ladder. However, his strong will and determination attract the attention of a mysterious figure. This figure could either be a mentor or a foe, and through their interactions, Ichigo slowly uncovers the secrets of this strange new world and his place in it.
One possible interesting plot could be Ichigo finding himself in a world where he has no identity or recognition. He could start a journey to regain his status while facing challenges from the new world's rules and characters. Maybe he has to form alliances with unlikely characters to survive and prove his worth.
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 interesting plot could be that Ichigo and Naruto are brought together in a strange alternate dimension. In this dimension, they have to team up to fight a new common enemy that has powers combining the Hollow and the Nine - Tails. They start off not understanding each other's abilities but gradually learn and combine their powers in unique ways to defeat the enemy.
Well, perhaps in this 'immortal ichigo twilight crossover fanfiction', Ichigo arrives in the Twilight world during a time of great unrest. The Volturi are on the verge of a major power play. Ichigo's immortality gives him an edge in this dangerous new world. He teams up with Bella and Edward. Ichigo's combat skills and reiatsu powers could be a huge asset against the Volturi's army. They could form an unlikely alliance to protect Forks and the rest of the world from the Volturi's tyranny.
One possible plot could be that Ichigo somehow gets transported to the world of High School DxD. He might initially be seen as a threat by the devils and angels there due to his unknown powers. But as they learn about his motives of protecting people, they start to work with him. Ichigo could also teach the characters in High School DxD about his unique fighting style and the concept of Hollow and Soul Reaper powers, leading to new and exciting battles against common enemies.
One possible plot could be that Ichigo and Yoruichi are thrown into an alternate dimension where they have to team up to find a way back home. Along the way, they discover new powers within each other and face powerful enemies together.
Well, perhaps in this fanfiction, Ichigo in Mugetsu form is stuck in a dimension where time and space work differently. He could start losing control of his Mugetsu powers and has to learn to master them again in this new environment. Along the way, he meets a character who has knowledge about his situation and helps him on his journey, which involves facing various challenges and foes.
In an 'ichigo crossover lemon fanfiction', perhaps there is a curse that turns Ichigo's world into a lemon - filled landscape. He has to cross over to different dimensions to find the source of the curse. Along the way, he meets various characters who are either affected by the lemon - related changes or are trying to stop it. His sword skills could be combined with lemon - related magic or abilities that he discovers during his travels.
One possible plot could involve Ichigo's spiritual energy causing a ruckus in the DxD world. His power might be misinterpreted, and he has to prove that he's not a threat. At the same time, he could learn some unique abilities from the DxD characters, and they from him. For example, the devils in DxD might be interested in Ichigo's zanpakuto and its powers, while Ichigo could gain some knowledge about magic from them.
One idea could be Ichigo getting transported to a different dimension where he meets various female characters from different anime. They all fall for his unique powers and his sense of justice. For example, he could meet a magical girl who is intrigued by his sword skills and a strong - willed ninja girl who admires his courage.
One idea could be that Mugetsu Ichigo finds himself in an alternate universe where he has to team up with his other - self from that universe to defeat a powerful new enemy. Maybe this enemy has the ability to nullify his Zanpakuto powers, forcing him to rely on new and creative combat strategies.