It was OOO who sealed the Greeed. Past OOO, that is. And Ankh just might wind up battling his other body parts. Which gives me a really weird picture.

*imagines two arms slapping each other, while two feet kick each other, and meanwhile a head's floating around screaming "FIGHT, FIGHT, FIGHT!" as it circles above the other floating limbs* O_O

And Ankh turning good...it's entirely possible. He's certainly being more sympathetic towards the others.