GreatLeo

I thought the secret boss Ragu Ragla from Wild Arms was a damn tough boss to beat especially with his Volcanic Bomb attack.

Emerald and Ruby from FF7 are quite easy when you have KOTR. Combine that with W-Summon and then have all the characters mimic that. I remember each member of my party had a master magic, master summon and master command going into the battles with the weapons so yeah it was too easy.

I think the hardest boss of them all would have to be Ultima Weapon from FF8 in the deep sea deposit area with about a million HP and no knights of the round summon in this game to help you either. Its not a required boss to beat so thank god for that but if you wanted the most powerful summon in the game (Eden) then you would have to face him it took me a few times to beat him I tell you that. Also notable is the Emerald and Ruby weapons from FF7 with a million HP each but can be beaten much more easier with KOTR.