Episode 684

"Gathering into a Powerful Front! Luffy and a Group of Brutal Warriors" is the 684th episode of the One Piece anime.

Short Summary
Luffy and Law survived Pica's punch and then are found by many of the fighters from the Colosseum, who all thanked him because "God Usopp" saved them. They all fight over who will kill Doflamingo and then join up together to begin the fight against Pica.

Long Summary
They intro with Zoro coming out of the rubble, finding Luffy and Law and how they survived. Cavendish comes in and thanks Luffy for saving him but talks about how he will kill Doflamingo. Luffy walks away and starts getting chased by bounty hunters, and Chinjao (Chinjao the Drill) catches Luffy and thanks him. Most of the other strong Colosseum competitors come back and fight over who will kill Doflamingo, and then the fight against Pica begins as Luffy tries to run away from the rest of the Colosseum competitors. Pica sees luffy and throws a punch with his huge stone arm, so Chinjao and Elizabello (The Fighting King) respond by using the "Dragon Drill" and the "King Punch" respectively and destroyed Pica's arm.

Anime Notes

 * The anime adds the following scenes:
 * When Pica throws the colossal punch at Luffy and Zoro, the group climbing up to the Old King's Plateau felt the aftershock. One of the dwarves accidentally let go of Usopp and Leo saves him.
 * While searching for Luffy, Pica expresses anger from remembering Luffy laughing at his voice.
 * Luffy's allies laughing at Pica's voice.
 * In the manga, Luffy and Zoro landed on the same spot in the plaza outside the Colosseum after they were sent flying by Pica's punch. In the anime, Luffy (while carrying Law) and Zoro were briefly separated.
 * In the manga, Luffy, Law, and Zoro were joined by more allies right after meeting Cavendish. In the anime, Luffy, Law, and Zoro left Cavendish and fought off some rogues who were after their bounties. In addition, the Chinjao Family did not chase after Luffy's group in the manga.
 * In the manga, Zoro was noticeably more alerted by Cavendish's presence, and even grabbed his sword, but in the anime, he doesn't seem bothered at all.