Hunter x Hunter: Greed Island Final - episode 10 - 15 Jun, 2004

Gon has trained a lot and is prepared to fight. Meanwhile, Battera's secret lover has died and the reward for completing the game is canceled. The battle between Gon, Killua, and Biscuit against Gensuru and his comrades begins. (Source: Wikipedia) Greed Island arc: (18/22)