User blog comment:HawkMan123/What if we know what is PLUTON all the time/@comment-30127592-20171007133529

It'd definitely be useful for Luffy to be Pluton, because that'd mean Franky knows the blueprints to rebuild him should anything happen. Him being a battleship would *stretch* my suspension of disbelief quite a lot, though (that was a terrible pun, i'm sorry).

Also, Momonosuke isn't the first nor the last with the ability to hear "the voice of all things", and since he hasn't shown any other odd/unique abilities, I very much doubt the theories about him being any sort of ancient weapon.