Fievel Mousekewitz is a fictional character and the main protagonist in the animated film series, "An American Tail." He is a young mouse who emigrates from Russia to America in search of a better life for his family. Fievel is known for his adventurous spirit and determination, often facing challenges as he navigates the new world. The character first appeared in the 1986 film, which was directed by Don Bluth. Fievel's journey highlights themes of hope, perseverance, and the immigrant experience. His story has resonated with audiences, leading to several sequels and adaptations, further expanding his adventures.