Kingdom Hearts coded was created on 2008-11-18.
Kingdom Hearts coded happened in 2008.
Kingdom Hearts: Coded is currently only available for Japanese Cell Phones.
Yes. At E3, two Kingdom Hearts titles were announced; Kingdom Hearts 3D and Kingdom Hearts RE: Coded. Not much information is available regarding Kingdom Hearts 3D, but it will be for the Nintendo 3DS and will utilize the 3DS's new 3D feaures. Kingdom Hearts RE: Coded is just Kingdom Hearts Coded, remade for the Nintendo DS.
It is a Kingdom Hearts game, but not important to the series.
I guess you mean what games there are. They (so far) are Kingdom Hearts I, Kingdom Hearts II, Kingdom Hearts 358/2 Days, Kingdom Hearts Chain of Memories, Kingdom Hearts Re: Chain of Memories, Kingdom Hearts Coded, Kingdom Hearts Re: Coded and Kingdom Hearts Birth By Sleep (plus some Final Mixes, for some). Next is Dream Drop Distance, for the Nintendo 3DS.
it is the mobile phone version
Coded is Japanese cell phone game ONLY.
Kingdom Hearts: Birth By Sleep [out soon] Kingdom Hearts Kingdom Hearts: Chain Of Memories and RE: Chain Of Memories Kingdom Hearts 358/2 days [out soon] Kingdom Hearts 2 Kingdom Hearts Coded [out soon]
Kingdom Hearts Chain Of Memories (GBA/PS2)Kingdom Hearts Coded (Cell Phone)Kingdom Hearts (V-CAST)Kingdom Hearts 358/2 Days (DS)
Cell phone
DeSmuME
so far as I see it, he is in Kingdom hearts 1, 2, chain of memories, re: chain of memories, and I'm not sure if he's in kingdom hearts coded or re: coded.