no you cannot turn into goofy.
No one except Sora Donald and Goofy
Sora, Donald goofy and Beast in times
You can only use Sora, Donald and Goofy, and Auron sometimes
yep
No, he doesn't die
Sora, Donald, Goofy and Jack Sparrow in some times
sora is the main character in kingdom hearts. Goofy and Donald travel with him. He lives on destiny island.
Yes.
He doesn't die
you can't. It's all you when you fight Sephiroth in KH2
Sora, Kairi, Riku, Donald, and Goofy!