Volume 72

Volume 72 is titled "The Forgotten of Dressrosa".

Cover
Starting from the top then left to right, the order of characters are Chinjao, Rebecca, Luffy under his "Lucy" disguise, Kyros as Thunder Soldier, Usopp and the Operation SOP dwarves, starting with Bomba then Flapper, Wicca, Leo and Kabu.

On the outside cover, Chinjao's head is in a flattened state, but in the inside cover his head is pointed.

Chapters

 * 712. Violet (ヴァイオレット): Sanji falls victim to Viola, one of the officers within the Donquixote Pirates under the name of "Violet", along with her subordinates. Meanwhile in Green Bit, Doflamingo and Fujitora arrived and confronts Trafalgar Law into a standoff. Back in Dressrosa, the battle royale for Block C has began, with Luffy excited to win the prize, the Mera Mera no Mi.
 * 713. Usoland (ウソランド): Fujitora attacks by bringing a meteor down to the ground. As the Straw Hats prepare to destroy the SMILE Factory, Usopp lies to the dwarves about being Montblanc Noland's descendant, and they respond by making him their leader in their battle against the Donquixote Pirates, dubbing him "Usoland."
 * 714. Lucy and Ucy (ルーシーとウーシー): Jora invades the Thousand Sunny, turning it and its occupants into art. C Block rages on, with Luffy taming the Fighting Bull, naming it "Ucy." Hajrudin then crushes Ucy, but Luffy gets revenge by knocking out Hajrudin.
 * 715. Closely Contested C Block (激戦区Cブロック): The C Block battle continues as more fighters are eliminated, and Luffy loses his helmet.
 * 716. Don Chinjao (首領（ドン）・チンジャオ): Chinjao rushes toward Luffy, eager to end him, and the two clash with Haki, knocking everyone out of the ring except them.
 * 717. The Forgotten of Dressrosa (ドレスローザの忘れ物): As Luffy and Chinjao battle, no losing contestants emerge from the Colosseum. Thunder Soldier reveals to Franky that toys were once people, and the dwarves reveal to Usopp and Robin that some of their people, including their princess, are forced to work as slaves in the SMILE Factory, which is right under the Corrida Colosseum.
 * 718. The Riku Royal Army in the Flower Fields (お花畑のリク王軍): Usopp, Robin and the dwarves make their move to Dressrosa. They go to a place called "Flower Field", where the tragic history of the dwarves were told.
 * 719. Open Chinjao (開けチンジャオ): Chinjao remembers how he once had a drill-shaped head which could break through anything, but it was flattened by Garp. Luffy eventually defeats him, but his punch causes Chinjao's head to become pointed again.
 * 720. Prisoner Gladiators (囚人剣闘士): Luffy meets with the other gladiators after his victory and goes to eat with Rebecca. Rebecca shows him several prisoner gladiators who are forced to fight 1000 matches or until they die.
 * 721. Rebecca and Soldier-san (レベッカと兵隊さん): Rebecca reveals that Thunder Soldier is her guardian and remembers how he took care of her and taught her to fight after her mother was killed. Rebecca then heads toward the ring as Block D is about to begin.

SBS Notes

 * Bartolomeo's birthday is revealed.
 * Abdullah and Jeet are confirmed to be based on two pro wrestlers, Abdullah the Butcher and Tiger Jeet Singh. Ideo is based on the boxer from the robot show Ideon.
 * Oda draws the Worst Generation genderswapped.