for an old man and a guy who has no weapon other than that bitch of a shield he is really powerful.
u know what's funny? he is the weakest member which is why his chair is so low. WTF? he wooped my ass so many times! its also funny when they say demyx was a horrible fighter yet a lot of people had trouble with him, lol.
Gameplay =/= story.
Depending on the choice, Organization members in gameplay
, regardless of their story-wise strength, can be weaker or better than they truly are in the mechanics. Xemnas was the most powerful, but almost everyone had no problem fighting him in KH2
. So, yes, it could be Demyx or Vexen was that one boss you had a tough time beating (and really, what made Demyx difficult was the time limit: which he doesn't have power over. That's Luxord's territory). However, it's not fact that they are really that strong in-game unless officially stated.