I'm surprised nobody mentioned Zu from Wutai. I've honestly never had a problem with Demon Wall it's always Zu who screwed me up. Not being able to use healing and summoning materia really screws me over and i despise having to use elixers and x-potions unless i really have to.

Yeah, same here. Zu was the hardest to me since you couldn't use Materia.

Not including Ruby huh? Well that's a tough one.....I'd say Jenove-LIFE. The one you fight after Aeris dies. I wasn't prepared for a boss fight then and was nearly killed. Bahamut saved me though.

well that boss that you fight on the elevator where you're only stuck with Red XIII, Barret, and Aeris........ well atleast that's what i chose as my party after Cloud and Tifa seperated from the group........ Aeris was weak, Red XIII had a decent Limit and so did Barret, just my items on stock made it hard for me lol.....

First off, that's the only people you can choose for the party as Tifa decides to wait for Cloud. Second, Aeris works well with spells. Next time you attempt that fight, equip her with bolt and restore+all materias

how can you lose to that Jenova? you get an item on the way that is not a secret that drains every attack it can use, you just skip your turn till it runs out of skill points, revive whoever didn't have it equipped and enjoy mass exp.