There are two different games where you can unlock Riku:
Kingdom Hearts 358/2 Days:
Reach mission 172 on Story Mode. This unlocks the character Riku to be played in Mission mode and multiplayer. Riku is in an Organization XIII outfit and is wearing a blindfold.
Kingdom Hearts Chain Of Memories/RE: COM:
Complete the story mode as Sora and unlock the special 'Reverse/Rebirth' mode. This unlocks a slightly different story mode involving Riku and his experience in Castle Oblivion.
Unfortunatly, you can't.
Defeat Riku (after Xion)
No. Riku never dies in Kingdom Hearts II.
You can't fight Riku in Kingdom Hearts II.
At the end of the game in the Land of Darkness, you'll soon meet Riku when he brings Kairi back to you. He'll soon join you to fight and destroy Xemnas. Unfortunately, you can't play as Riku in Kingdom Hearts 2.
there is a kingdom hearts 3 for the ps3 but we dont kno if riku dies in kingdom hearts 3
Riku does lots of things in the kingdom hearts games. Riku tries to gain power and fights his friend sora. and he does more stuff
Yes. Once the regular storyline is completed , the title screen will change and the words Reverse/Rebirth will appear under the Kingdom Hearts logo. The picture of Sora will turn into Riku and he will then be a playable character.
Kingdom Hearts
Wear clothes like Riku.
No you can't. But if you have the Kingdom Hearts 358/2 Days for DS you can play as Riku in mission mode.
You cannot play as him in kingdom hearts 1 but you can in kingdom hearts: chain of memories.