Are you guys serious? the first time I played Xaldin I was also thinking "oh god, what am i ganna do?!" But if you play it a million times you get the hang of it. The first time I played him, yes i died to and became Micky, but I didn't know you could HIT the guy! So I kept trying to do the D-charge but he kept hitting me so I died, but I eventually beat him. ( but then the second time was easier cause then i knew you could hit him...;])
Oh, about the water guy (his name is Demix by the way), what I did was keep slashin when he didn't say dance water dance. When he says that, swing your keyblade once at those water things, and they'll turn to a musical note. Get by one and you'll see a reaction command that says... water slash or somthing, so use it and wipe out the other water poeple. The first time he say's it is easier cause the game lets you keep going if you got 1 more or somthing, but the second time he does that, you need to get rid of all of them! It takes practice, but you'll get it! Then try not to die. I think Valor form works best cause it's stronger. This idea didn't work for my sister, but i hope it'll work for you...(i gatta stop writing long comments! ;])