Yes... It seems sort of weird that you can defeat the Hokages at level 14 in the forest with just one fatal swoop... But yes, the other forest creatures shouldn't have these special effects. Imagine the mail shinobi with mangekyou sharingan. o.o
But I would really like to see the Hokages at level 14 more of a challenge, makes it more fun and realistic. >.>
Well, I might as well brainstorm if I amasking for these, right?
Naruto - Unleashes the Kyuubi during battle if you get his health really low. He gains more attack and becomes more quicker, so he would probably get two attacks in one round... for example:
"Kyuubi-powered Naruto strikes at you with 5 points of damage
Kyuubi-powered Naruto strikes at you with 5 points of damage"
Sasuke - Uses Sharingan and Curse seal... and I'm pretty sure it's self explanitory what else he uses *cough*chidori*cough*
Kakashi - As said before, Sharingan.
There are more characters, but they should fight compatible to what they do in the series
As for Konohamaru/ all the other level 2 creatures, their weakness suffices with your level... Or does it.
If ya don't like it, just say so.