SolidusDave
Member
Not sure, don't watch the anime and didn't notice it in the manga. Will keep a look out when I re-read but I wouldn't think so. I think Oda has just more or less dropped dials. Blackbeard agreed that Sky Island exists but who knows if he's actually been there; probably not.
True enough Blackbeard is set up as a mirror of sorts, Strawhat and Blackbeard are presented by Oda as complete opposites yet with major similarities too.
Yeah I guess it was just a way to temporarily boost the attack power of some of the weaker characters for the plot. Oh well, it was presented as Skypia specific tech anyway, so it makes sense that no one uses it.
btw here's the attack I was wondering about:
https://www.youtube.com/watch?v=9X5R3UIyKI8