Try it in dissidia.
probably sephiroth.
Hell no. Sephiroth's blade is very powerful and so is his magic. A monkey would fail against his might.
Maybe, this can be tested in FF Dissidia but i am certain kefka would win.
Considering that Kefka became a God, and the Joker is just a normal (yet insane) human, Kefka should pretty easily win. Good question though as they are both crazy clowns. Kefka also managed to destroy an entire world to ascend to godhood. Joker is probably a more interesting character though.
lol no.
Sephiroth could never have the Keyblade. Remember when Sora gave Jack the key and he did that trick? Not only that but Sephiroth is a being of darkness, with a weak heart at that.
No, I don't think they would.
By default it would have to be Crescent because Hojo's last name has never been revealed.
Gogeta even in his normal form.
Great battle. It would be a great battle. But for some reason I think Sephiroth would win (With wounds) and say something like "Hmph" and go away.
Absolutely he would defeat him in one attack.
Sephiroth's objective is to attain Godhood, by "becoming one with the planet", meaning that he intended to absorb the life energy that the planet would have gathered to heal the wound inflicted upon the planet by Meteor. As for the Jenova Reunion, Sephiroth simply used it to obtain the Black Materia that he needed to summon the Meteor.