this chapter contained maybe the most epic moment in pokemon game history. i still thinks that N's castle rising in the game was the first 3D using that actually made impact story wise and not just for the effect, and the manga transmits it just fine.
the end was, a bit ridiculous (every random trainer black and white had met had come to fight ghestis?), but i believe that the author had returned to the glory epic finale as GSC and RS (unlike what DPePl had) and it's not even using too much original ideas as those needed to get that.