very easily solved if he accidentally killed crocodile midbattle. he still has proof. I don't know what's the problem he could replace crocodile as a Shichibukai and a hero of alaabasta.
This could be solved by hashirama using a wood clone of Robin. Otherwise a shadow clone. he could then have it transform into Robin and have that run away visibly. The marines would follow 'Robin' and she would be able to live in alabasta in disguise.
GO SAVE UTA!!!!!!!... if you dont know who she is... go see the movie ONE PIECE: RED.... she must be the musician of the crew... her abilities are OP if used correctly.
No inesperado, incluso si Nico Robin no iba con ellos a ver a Cocodrail. El ya sabia que lo traiciono, definitivamente iba a hablar sobre Robin. Gracias por el capitulo