Robin: "...Oh... Pluton is in the land of the Samurai, Wano-kuni."
Crocodile: "...Whitebeard was right, I should have retired. Heh. Well, Miss All Sunday... how do you feel about infiltrating the Beast Pirates?"
But, in all honesty, Crocodile might have just ended it all after finding out his entire plan was pointless due to Kaido's presence in Wano. Robin saved Croc from going into total depression. That's my girl.