ok i just bought KH2 today (before i had just rent it) and the lady in the store plays it and she told me that i should power up before things get hard. and i said ok... so umm how do i do this???
it probobly just means to get as much experience as you can, you know, kill all heartless/nobodies and get all stuff before you get to a part you can't beat so you have to go back and do other stuff which is annoying.