Brazil World is an admin ability that literally repaints the map in Brazil's colors: the scenery turns yellow and green, and the sky displays the Brazilian flag. A pure cosmetic gimmick reserved for staff that you'll only encounter on very rare occasions.
How to get it
Admin Exclusive Ability: impossible to obtain by playing normally, only staff members can trigger it.
How It Works
Once the ability is activated, the entire map changes appearance to evoke the Brazilian flag: the scenery turns yellow and green, and the skybox is replaced by Brazil's flag. It's a purely visual effect, referenced on the 
Second Sea side in the community documentation.
Awakened Bosses
Baits
Ban Restore
Beast
Blox Fruits
Blox Fruits "Stock"
Blue Gear
Blue Moon
Boats
Books
Bosses
Bounty and Honor System
Brazil World
Chess
Chests
Codes
Combat Mechanics
Combos
Commands
Common
Consumables
Crew
Cursed Chest
Damage Counter
Dashing