Dark Yabu from Vexx gave me the most trouble to date. It's not an RPG, It's you and your skill level vs dark Yabu, no levels, no strengths or weaknesses, just perfect timing for every move...For me at least....For an RPG it was probably Dullahan of Golden Sun TLA, I've never beaten him normally.
"Elapsen semel occasionem non ipse potent lupiter reprehendere."
Ruby weapon its pretty much. Cloud versus him. And yeah if ur party members are dead you can avoid the tentacle bs for 1 turn. But its better to just have cloud god like farming power sources and so much training goes into just getting the right setup.
FF7 is the best FF. Charizard is the best Pokemon EVAR