A Comprehensive Anatomy! Fierce Fight! The Five from the New Generation!

"A Comprehensive Anatomy! Fierce Fight! The Five from the New Generation!" is the 9th episode recap of the One Piece anime.

Short Summary
It covers the fight on the Skull Dome's roof between the Worst Generation and the Emperors Kaidou and Big Mom.

Long Summary
Kid and Killer introduce themselves to the viewer, and tell them to stay and watch as they go over the fight between the 5 Worst Generation members and the 2 Emperors.

Kid starts by explaining that they successfully snuck onto Onigashima and challenged the Emperors to a fight. Luffy is able to hit them, and he declares that he'll be the one to defeat them and become the King of the Pirates. Kid then explains Luffy's challenge not to dodge Big Mom's attack, and Killer chastises him for taking it seriously.

The five Worst Generation members all attack Kaidou at once, but Killer is interrupted by Big Mom. Despite their attacks, they're unable to seriously damage Kaidou, but Zoro is able to emulate Oden and cut off one of Onigashima's horns. As Big Mom continues to rain lightning on the combatants, Kid and Killer remark that it's like fighting a natural disaster, but also point out that Luffy was able to bypass her lightning due to him being rubber.

As Luffy charges as the two Emperors, he takes a Bolo Breath head-on from Kaidou, before attacking the dragon with Gomu Gomu no Kong Gatling. His attacks force Kaidou to switch to his Hybrid form as Luffy runs out of time with Gear 4, and Kid remarks that the Emperors look like hell.

As the Worst Generation members watch the Emperors, Law realizes that fighting them both at the same time is simply too much for them. Kid asks if Law can move one of them to a lower floor, but Law states that he can't; instead, Kid comes up with a plan to separate them. However, as they talk, the two Emperors launch a joint attack, forcing Zoro to block it. They then attack the pirate individually, and Kid, Law, and Zoro are able to throw Big Mom off Onigashima; Kid remarks that if Luffy had been involved, he would have messed up the plan. On the rooftop, the Worst Generation members manage to trap Zeus, but are unable to stop Prometheus and Napoleon from going to save her.

Kid and Killer head to the edge of the island to deal with Big Mom, while Zoro and Law continue to engage Kaidou. Zoro is able to reopen Kaidou's chest scar, but it's not enough to stop him, and he quickly defeats the two pirates. Meanwhile, Big Mom flies back up to the rooftop, and is able to hit Kid and Killer with an attack, collapsing a section of the rooftop.

However, Luffy has now reawakened, and he begins to engage Kaidou once again. He's able to repeatedly damage Kaidou for the first time in this fight, and tells Law and Zoro to go downstairs, stating that he'll defeat Kaidou no matter what. However, Kaidou is eventually able to wear down Luffy, throwing him off the island. Meanwhile, on a lower floor, Kid reengages Big Mom, stopping her from killing Usopp, Nami, and Tama.

Finally, Kid and Killer wrap up their summary, thanking the viewer for watching. Kid says they're going to finally defeat Big Mom, and Killer points out that they need to take down Hawkins as well.