Ok, what idiot made some quests in Portrait of Ruin impossible to complete if you sell worthless early-game items (such as the long sword which can be found only once and isn't dropped by any monsters)?
You've come across one of the many reasons that PoR can eat a dick, in my opinion (except the soundtrack). I'd started hording a lot of items after Dawn of Sorrow required it for soul synthesis, but Portrait took it to an ridiculous level. I can't remember if I ever completed them all or just got to a certain point and gave up.
I don't mind not selling stuff... it makes the game a bit harder as there's less money for potions. I just wish I'd known ahead of time. On a good note, once I realized it was impossible to complete all of the quests, it shorted my completionist circuits and saved me the trouble of doing all of those mostly pointless quests. I'll be sure not to sell anything in OoE which I'll be starting soon.
Also a quick comment on sisters mode... man is that poorly balanced (toward being way, way, way too easy). I didn't encounter any challenge until the last two courses of the den of evil. Also, I'm surprised they didn't make the face and R buttons duplicate the function of d-pad and L buttons for left handed players. This mode is very intriguing to me because when I was designing a DS game, I had considered having floating characters very similar to the way the sisters move and attack. Only my game would have added "symbol parsing" which would allow you to draw symbols to activate several additional weapons or attacks. I was going to use double taps for directional dashes as well to add some mobility to what is otherwise a lame movement system. I think the concept really had potential... too bad it wasn't explored more fully.