Are you talking about the first one only? If so then don't read the rest, but I will tell you who dies in KH1, Re: Chain of Memories, 358/2 Days, and KH2. You are about to see so many spoilers if you are reading this sorry!
Kingdom Hearts 1- No one really you kill a lot of bosses + Maleficent, but in the second one Maleficent comes back to life and brings back the Disney bosses with her. And Ansem you think dies too.
Kingdom Hearts Re: Chain of Memories- Sora Mode- Vexen, Larxene, Axel ( who you think dies but doesn't he just teleports back to the Castle that never was.) and Marluxia. Reverse/ Rebirth Mode ( Riku)- Lexaeus, Zexion and Ansem.
Kingdom Hearts 358/2 Days- Alot of Heartless just like all the others. Mostly Heartless bosses( No Disney Bosses) , you get to fight Saix( he doesn't die yet), and Xion dies.
Kingdom Hearts 2- I'm not sure if any Disney bosses actually die or not. Okay there is the rest of Organization XIII so i will list them out. Demyx, Axel ( he basically kills himself if you play the game you'll see but he's not suicidal or anything.) , Luxord, Saix, Xigbar, Xaldin and Xemnas.
I don't have a PSP so I haven't played Birth by Sleep yet sorry!
NO!, and Kingdom Hearts 3 is not a game.
there is a kingdom hearts 3 for the ps3 but we dont kno if riku dies in kingdom hearts 3
No. Riku never dies in Kingdom Hearts II.
No, he doesn't die
No he doesn't. If your referring to the first Kingdom Hearts he will get out of the door to darkness. Sorry if I spoiled it.
No. There are no cheat codes in the kingdom hearts series. You simply have to level and be skilled.
Techinically,yes
When you die to a Shadow.
Riku kills him
No.
SPOILER: Yes.
*SPOILER ALERT*Yes, Saix is eliminated by Sora in The World That Never Was, during the events of Kingdom Hearts II.