Hunter x Hunter: G.I. Final

Gon's and Killua's journey through Greed Island continues. Searching for his father, Gon wanders round Grees Island until meeting Bisuke. Bisuke serves as their master and trains Killua and Gon and enhance their abilities. The three encouter many troubles, as well as clues to Ging's whereabouts, and strived to emerge successful. (animenewsnetwork.com)