Madatascar Island

Madatascar Island is a non-canon island in the New World that was occupied and controlled by the DX Marines. It became autonomous once the group was defeated and its leader Smash was arrested.

Geography
Madatascar Island's geography is similar to the structure of Univeral Studios Japan's WaterWorld stage. Not much is known about it.

Citizens
The only named citizens of the island are Volg and his daughter Flora, who make fireworks for the island's annual festival.

Annual Festival
Each year, the residents of Madatascar Island host an annual festival. The festival features fireworks displays created by Volg and Flora, but while the DX Marines were in power, fireworks were banned. The festival proceeded as normal after the island's liberation.

Past
Volg and Flora were creating a special fireworks display the latter designed when the DX Marines came to Madatascar Island and seized control of it. The group banned all fireworks and demanded absolute obedience from the island's citizens.

One Piece Premier Show 2012
The Straw Hat Pirates came to Madatascar Island, and a fake of Crocodile launched a sandstorm at them, separating them. Away from his crew, Luffy encountered Volg and Flora, who explained the island's situation with the DX Marines, and Luffy vowed to help them. A fake of Boa Hancock confronted the crew and petrified Sanji. Luffy returned to his crew and fought Smash and Bildy while the rest of the crew fought their Seven Generals. A fake of Law appeared and confused the crew, and Bildy revealed his powers. He used them to create a fake of Oars, but Caesar Clown, who had been held captive by the Straw Hat Pirates, used a halved Shinokuni to defeat the fake giant. Luffy defeated Smash with Gomu Gomu no Grizzly Magnum, and the island was freed, allowing the annual festival and schedule fireworks to proceed.

Trivia

 * Its name may be based on Madagascar, an island country located off the eastern coast of Africa.