Kimi o Mamoru - Kaikō Yamato to Momonosuke (E999)

Franky faces Big Mom with the help of Robin and Jimbei, but the Numbers come interrupting their battle. One of them holds Brachio Tank with Usopp and Chopper inside in his hand. Meanwhile, Yamato, the self-proclaimed Oden, finally meets his son Momonosuke. (Crunchyroll)