If you're talking about the Wikipedia article on Bo-bobo, it was wrong.
THERE IS NO BO-BOBO/ONE PIECE CROSSOVER. If there was, we'd all know about it.
Woah woah woah. You mean our AF prank got mentioned in a freaking wiki article? See, that`s why I say, wiki may be good for some things, but take it all with a grain of salt.
I heard from another group waaaaaaaaaaaaaaaaaaaaaaaaaaay back that there was another cross over with OP i think it was AstroBoy and someone else against Arlong but that was about two years ago that i heard about it has anyone heard of it? ( i don't member all the details)
Who you heard that from was very likely myself or someone who heard it from me.
Yes, in summer 2003 there was a DBZ/Astro Boy/OP crossover that included a battle against a floating Arlong Park 2. I took some shitty video of it but it isn`t worth transferring because it is super bootlegg quality. Maybe it will end up online somewhere someday.