User blog comment:DarkSkullPirates/Where In the World is Momonosuke?/@comment-4493594-20120820231719

If Momonosuke is on Punk Hazard he might be one of CC's trumps or the last fight. Like, the first successful experiment of whatever it is that he needs the children for (yeah, grow giants, but what for?). Making it a really hard last battle. Maybe with Luffy and Law arguing about their respective morals in regards of saving Momonosuke.

How he got there? Maybe Kinemon and his son were travelling. And who said all the children are from the G5 island anyway?