Final answer:
Eminem's character in 8 Mile is named Jimmy Smith Jr., also known as B-Rabbit, and the film depicts his journey as a rapper in Detroit.
Step-by-step explanation:
In the movie 8 Mile, the character played by Eminem is named Jimmy Smith Jr., who is also known by his stage name B-Rabbit. This film, which is loosely based on Eminem's real-life story, follows the struggles of a young white rapper in Detroit as he attempts to make a name for himself in the music industry. Jimmy Smith Jr., or B-Rabbit, is portrayed as a talented but troubled individual who uses his lyrical skills to express his life experiences and overcome adversity.