Chapter 831

Chapter 831 is titled "Adventure in a Mysterious Forest".

Cover Page
From the Decks of the World: The 500,000,000 Man Arc Vol. 21: "Rusukaina - Our dear boss, long time no see!".

Marguerite shows Luffy's new wanted poster to the beasts on Rusukaina.

Short Summary
After arriving at the southwestern shore of Whole Cake Island, Pedro and Brook split off from the rest of the Sanji retrieval team to search for Big Mom's Road Poneglyph.

Meanwhile, Luffy, Nami, Chopper, and Carrot disembark onto the shore. After Luffy thinks he sees Sanji, his group runs into the nearby forest filled with sweets, where they encounter new dangers.

Chapter Notes

 * Brook and Pedro separate from the Sanji retrieval team to infiltrate Big Mom's palace and acquire a copy of her Road Poneglyph.
 * Luffy, Nami, Chopper, and Carrot enter a place called the Seducing Woods.
 * They were lured in by what appeared to be Sanji.
 * Luffy encounters and battles against a duplicate of himself.
 * Nami and Carrot gets attacked by what appears to be a Rabbit Mink. This minks' silhouette was shown in Chapter 827