Ganbare Genki
Genres: Action, Comedy, Sports
Type: TV, Episodes: 35
Aired: Jul 16, 1980 to Apr 1, 1981
Studio: Toei Animation
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
Horiguchi Genki was 5 years old boy. His mother died when he was born, and he was raised only by his father. His father, Shark Horiguchi, was a professional boxer, but he was ruined and become an itinerant boxer. However, Genki believed his father was strong and he would become a champion, and he had a dream to become a strong boxer as his father. 
After his father’s death, he was adopted by his grandparents. Although they opposed Genki boxing, Genki made up his mind to become a boxer, and he continued training secretly. Meeting with various people, for example, Teacher Ashikiwa who resembles his mother, Mishima who is a high school boxing champion, he made his way to be a boxer. 

(Source: AnimeNfo)