1 being easiest 13 being hardest 13. Void soul (Soul melter) 12 Meta knight 11. Hyness 10. goldon and silvox 9. yggy woods 8. Francisca 7. Flamberge 6. Zan partizianne 5. morpho knight 4.Kracko 3.Dedede 2. Void Termina

1. Grand mam (1 cycle is easy)

None of the bosses are actually hard though

14 being easiest 1 being hardest

1. Void Soul (Soul Melter)
2. Morpho Knight
3. Hyness
4. Void Termina
5. Meta Knight
6. Francisca
7. Kracko
8. Zan
9. Flamberge
10. Goldon and Silvox / Pon and Con
11. King Dedede
12. Yggy Woods
13. Whispy Woods
14. Grand Mam

Although none of them in my opinion are too bad except Void Soul.

In terms of speedrunning though I feel like Pon and Con / Goldon and Silvox, and Hyness can screw you up the most in terms of time if you aren't careful.

i mean if your talking time wise, I feel Dedede should be a bit harder. considering his skip can be really annoying, but the magic elemental girls are easy. Just wondering why their so high on people's list