Large Clay land and Solid Armor: These guys are just like those you faced in the first three KH games you know the ones that can't be hurt in the front but in the back but this time you can't harm them from the back so attack their heads large armor be harm by fire, clay by thunder, solid by blizzard, and land by aero magic. These magic is most effective once these guys are tumble down if they hadn't keep swinging on their head until they're down but becareful if they get up they'll swing around so do it until they're gone for good.
Barrier Master: These new punks of the KH series are such a pain. why? One thing they can give their pals sheilds from attacks even magic won't help so the best way is that if you see like a light on them thats a barrier that means these guys are in the area. The best way to get rid of it is by defeating the ones cause it to physically hit them first take down their book without it the barrier is down but don't attack nothing once the barrier is down. Why? If these guys get their book back the barrier is up again so to make sure that doesn't happen defeat these guys first otherwise you'll be wasting your items magic and wasting time.
Carrier Ghost: This dude is like Hover Ghost but way more health like 5 or 6 life bars this guy even can pick you up and sap your health if you get caught rapidly press buttons to shake loose. IF I know something negative effects like blinded or burn effects can stop this dude from dissappearing.
Living Pod: These guys are like Carrier Ghostbut mid-size they have the same thing as both Hover and Carrier Ghost the possess ability regroup if necessary.
Morning Star Spike Crawler and Scorching Sphere: These guys spin around once the battle started but if you face anyone of these guys in Olympus world theres barrels to deal damage if you want to but other then that block to stop their spinning attack keep doing it until they started to spin their last dance.
Zip Slasher Blitz Spear Dual Blade Heat Saber Chill Ripper and Stalwart Blade: These double sword Heartless's are powerful you gotta attack them once they did their spin attack with stab attack and their magic they even stopped moving once they jump to send out shockwaves so take this opprotunity to show them whose sword or keyblade for this matter is masterful.
Powered Armor: This guy is a improve version of guard armor but uses the same tatics strike the head on the fifth shockwave it is here you can dealt damage so once his body parts like his hands and feet is off of him attack his hands if possible as well as the feet also if possible if you don't get rid of these try again once all four of them is gone go all out and listen to
Emerald Serenade: this guy is a wuss but he speeds up once you hurting him the best way to deal with this guy is by ambushing him like if he goes clockwise go counter clockwise.
Ruler of the Sky: Man oh man this dude is gonna be a doozy. Why? One thing you have to chase him down to strike his tail segments after each one destroyed he glows red and charge at you wait too close to the water he'll shoot salvo of water shots and be wary of his glacial spear attack that rise in the water you'll see them as a snow white circle closing in indicating hes trying to make you miss him if possible but also watch out for his coin attack he'll shoot them like a machine gun once he runs out attack his tail segmants until his core is expose then once that happens wait till hes exhausted then blast that core with Fire oh and be care full of his Donkey Kong ground pounding move you'll get the picture.
Saix: OH yeah thats right you fight him just like you fought him in KH 2 the dude before Xemnas battle. I just want you to know that just dodge or run away then once he throws his weapon at ya hit him it'll take him time to bring his weapon back once receive too much damage he'll be normal making him more valnurable for more attacks keep doing it until hes defeated its no wonder why Roxas didn't destroyed him hes not strong.
Xion three forms: MAn she'll make Master Xehanort look like a little baby she has dangerous powers cause Soras memories from these worlds mutiplied her powers (If i was ever married I will named my first born daughter Xion) shes dangerous if left unchecked she can heal herself bringing until shes has 3 life bars you can stop her from doing this but only she doesn't brought up that shield trust me I know. Her first and third form are somewhat easy then the other but the hardest is her second form her Arcs Arcanium move that move will almost wipe you out once she uses this its your opprotunity to hit her but only with 3 or 4 hits then fly fly away.
And thats that oh and the fourth form is more dangerous then the other three cause she has this devestating limit break that'll make yours look like a total wuss so be sure to attack her often and block often as well but you only have one boss battle and that is Riku attack him from behind at all times otherwise you'll get hit once he gets hit on the front