He could also just cum in a cup, genderbend, inseminate himself and carry the child for 9 month and turn back
Iva changing people's genders for stealth missions is actually interesting.
Need to hide someone? Genderswap em.
Ugh Bonney needs to join the Revs, Bonney and Iva could do so much weird shit with their Fruit powers combined.
Garling: "You fight like a girl, Bonney."
Bonney and Iva turn Garling into a girl toddler, also give him hormones that cause severe acne. Bonney goes full Nika + Iva strength hormones + Iva turning Bonney male to get the testosterone + Bonney Nika Hell Wink (learns it from Iva) with Luffy's Haki stored in a giant turkey drumstick.
Bonney can break through Vice Admiral Haki of a character like Doll who can low diff a named Giant Pirate (Kashi). Ivankov is Yonkou Commander level.
Bonney and Iva are going to be a giant problem for the Marines.
"All of my troops have become women! HEY, STOP FEELING YOURSELF UP! AND YOU TWO, WHY THE HELL ARE YOU KISSING???"
"Women? Lucky you, MY ENTIRE BATALLION IS BABIES."