I've heard that iron prisoner is one of the hardest bosses in the game. So, what makes him so hard? What moves does he use that takes most of your health away? And how did you managed to beat him? And isn't there more than one iron prisoner in the mirage arena? Also, please don't give me any tips on how to beat him. I want to figure out how to beat him on my own. I just want to kbow how hard and what moves he uses and if there are more than one iron prisoner.

I dont think hes that hard. Of course i havent faced the 4th form. The moves he does to hurt you the most is probably the one who he swings his axe three times, but before you have time to get away he does it again. I also hate when he constantly spins around and hurts you alot. I managed to beat him by bringing along cure magics or potions, then just hitting him with regular attacks and using special moves like where you throw the keyblade at him. And yes there are three forms that I know of, but apparently theres a fourth. There might be a 5th but not totally sure. Hope I helped without telling you how to beat him!

There are only four Iron Prisoners, the first one is pretty easy compared to the others. The fourth one i think has this cage it uses to capture you. He sent it underground and it will follow you. It also have a move that sucks you in and then explodes. Dealing only damage to you.

 

They also change their appearance. Example: The iron Prisoner I is more in capture and doesn't have that many moves as for Iron Prisoner IV who isn't in any kind of chains and therefore a lot more free to do more and powerful moves.

 

The hardest thing is probably that the moves are hard to predict, and any move could come from anywhere.

He's not really hard per se, he's just a real pain in the ass. He constantly attacks, barely leaving any room for counter-attacking.