Not 5, then again I haven't beaten the game yet. From what I can say; 1. Ansem (Fight 2, still can't beat him) 2. Spellican (Fight 1 in Traverse Town, ridiculously small area for three boss fights in a row >.>) 3. Xemnas (Honestly not that bad of a fight, but he can catch you off guard like nobody's business) Keep in mind this is coming from a Low Level Proud Mode run.