Hajime no Ippo: New Challenger

Hajime no Ippo is the gold standard for sports anime. It follows Ippo Makunouchi, a shy teenager who discovers a passion for boxing and works his way up the professional ranks. The 2000s installments, particularly 'New Challenger,' feature some of the most intense and well-animated fight sequences in history. Beyond the ring, the show excels at character growth, humor, and the camaraderie of the boxing gym.

It is an incredibly inspiring series that captures the grit, pain, and glory of the sport with unmatched authenticity and heart.