In Kingdom Hearts 2, by the time you get the "Drive" Ability (you get it at the big encredibly tall castle were you gotta walk up those really annoying spiral stairs), you will have the valor form. once this happens, complete the world(when this happens you r able to fly the "Gummi Ship"). then go to "Hallow Bastion", use drive when the cutscenes are over, and equip the higher jump lvl 1 ability in the start menu. normally it's already equipted, but you get the idea. it says you can jump higher the longer circle is held down in valor form, do this and you will finally realize that you jump no higher than when in normal form!