One Piece: Is Momonosuke An Ancient Weapon?

gamerant.com:

Momonosuke is one of the most intriguing characters in One Piece's post time skip, especially the Wano country arc. Introduced in Punk Hazard as Kin'emon's son who had accidentally eaten a failed Devil Fruit, nobody expected him to play a massive role in the series moving forward. With time, however, it was revealed that Momonosuke was actually destined to be the next Shogun of Wano Country.

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In One Piece's Wano Country arc, Momonosuke's importance shot through the roof and he has, since then, become a compelling character with a major role that goes even beyond his own arc. Not only did he face his fears with terrific bravado but he also earned the right to become the next Shogun of the country. Momonosuke is quite special and, as things stand, he might end up being far more special due to having ties to one of the Ancient Weapons – Pluton.

The truth about Momonosuke was revealed during the Zou arc, where his lineage as a Kozuki was brought forward to the fans. Momonosuke mentioned that he had, in the past, traveled with the likes of Roger on his ship. In the same arc, Jack launched an offensive on Zunesha and while both Luffy and Momonosuke could hear Zunesha's screams, only the former was able to command it to defeat Jack. This power is extraordinary and goes even beyond the Voice of All Things.

Luffy attempted to talk to Zunesha but failed. At the same time, Inuarashi and Nekomamushi mentioned that both Oden and Roger were able to hear the same voice but, just like Luffy, they could not command the beast. Yet, Momonosuke somehow can and this ability is exclusive to him, which is a big indication that he is special indeed. Interestingly enough, Momonosuke is not the