Honestly, I just keep on beating Riku over and over, but it isn't really getting anywhere. Does anyone have a good idea on how to LVL up quickly. It would be great if you post some.

Thats the best way, make sure to kill ALL the heartless, you could equip that double ring that gives you a lv2 exp boost

i fight the six heartless bosses and riku i also have the lvl2 exp boost ring

Just do all the Missions in order try the full them up if u haven't unlock sora great timing which i havnt yet some missions are so hard u run out of time

use the ring, and do the heart point mission, more heart means more heartless, more heartless mean more exp

Not exactly Koolkingdom. I got like 1.2k heartpoints in a mission and that's like 500 exp. I'm like level 71 so that does nothing. It all depends on what heartless you fight. I find that the riku mission is the best since you get 200 heartpoints for each neoshadow you defeat and then alot from riku.

use the extreme ring on bosses. I did and i'm lv 80

Isn't extreme with the 1 HP thing? Or is that the one with perma-plight and such? What bosses did you fight?

Well if you can pull it off, put on the EXTREME ring and face riku, you have 1 hp only so be careful. If you have a friend with the game team up let the friend kill riku while you stay away youll get about 6000 in exp:D