If you're looking for manga similar to Hunter x Hunter OVA 3: Greed Island Final, you might like these titles.
It took 430 years for the light of a star’s supernova to reach Earth - and when it arrived, the sky lit up for twelve days and people began to change, gaining powerful superpowers that terrified the populace. Over a decade later, these individuals are rounded up against their wills and shipped to a secretive island known as “Area D”, where they’ll begin a new life with the other “Altered”. Jin and Satoru are two such Altered who find themselves aboard a ship bound for Area D, where a survival of the fittest awaits them.
The boy asked the man, the man answered....."I've been there, in the Korakuen Arena, fought against Hanayama Kaoru, it was amazing." The boy asked him again but this time a question that terrified him to the core 'Where's the amusement park?" the man had no answer.
There is a hidden island that is a mecca for martial artists. There are different reasons people go there--because they want to become amazing at their art, or simply because they come from a family known for martial arts and they are sent there by their parents. In any case, new arrivals sign a contract that they can't leave for 10 years, and that contract is strictly enforced. Within the complex, there is a forbidden area...
The world's greatest exposition of the pirates, by the pirates, for the pirates—the Pirates Festival. Luffy and the rest of the Straw Hat Crew receive an invitation from its host Buena Festa who is known as the Master of Festivities. They arrive to find a venue packed with glamorous pavilions and many pirates including the ones from the Worst Generation. The place is electric.
While Luffy and his crew of Zoro and Nami are starving on their small boat, they are attacked by a large monster. Nami is taken away, while Luffy and Zoro wash up on shore. There they meet a young girl, Medaka, and learn of the sad history of the island. The evil Pirate Ganzack has taken away all the men in the village and enslaved them, including Medaka's father. Now Luffy, Zoro, and Medaka must infiltrate Ganzack's base in order to rescue the villagers and Nami.
Having been abandoned by their mother, ten-year-old Kokoro and his blind little sister Yume have traveled to Hohzuki Island to start a new life. There, they join four teachers and four other students at a special school with few amenities; but soon, the pair discovers that something is terribly wrong. At least one student is missing and presumed dead, the teachers are hiding secrets from them, and none of them know if they'll ever manage to escape alive...
The spirits of ten legendary warriors, who in ancient times had saved the Digiworld, now present a new power to the Digidestined! To save the Digiworld from evil, Takuya, Koji, Tommy, J.P and Zoe must band together as a team to find their chosen spirits!
Rinka is a financially struggling high school girl living with her single father in Tokyo. One day, while going home from school, she sees a penguin flying in the sky towards the Tokyo Sky Tree. She chases after it only to find fish swimming in the air! One of the fish goes through Rinka and causes her to pass out. She wakes up to find that she has developed the ability to slip through solid objects..