Episode 991

"Enemy or Ally? Luffy and Yamato!" is the 991st episode of the One Piece anime.

Short Summary
Evading Ulti and Page One, strong members of the Tobi Roppo, Luffy tries to find out what Kaido’s son Yamato’s motive is. However, the two get in a fight. Taking Luffy’s punishing attacks, Yamato remembers someone he fought against in the past.

Anime Notes

 * The anime adds the following:
 * Big Mom continuing to chasing Usopp and Chopper. The moment when she hit the Brachio Tank V (which caused it to later activate the leg parts of the General Franky robot) is also seen.
 * Big Mom leaving after Prometheus notifies her on the location of Nami's group.
 * Robin and Jinbe arriving at the Skull Dome. The former also knocks out a Beasts Pirates member who tried to flirt with her.
 * Kaidou criticizing Orochi.
 * Luffy breaking free from Yamato's grip.
 * A brief flashback of Yamato's fight against Ace.
 * The anime extends the following:
 * The Gifters trying to persuade Zoro to join Kaidou.
 * Zoro's fight against the Gifters and subordinates.
 * Luffy and Yamato's fight.