Pluto doesn't create Dark Corridors, he uses them. When have you ever seen Pluto create a Dark Corridor? He always just runs through ones that others leave open.

Anyway, as long as we're asking questions, I've got one. This is a bit long, so bear with me.

There's a certain mission in Kingdom Hearts 358/2 Days where you have to chase a "mysterious figure" (who the characters believe is Riku) around Twilight Town. During the mission, you chase the figure around, attacking when it stops. Let me emphasise you HAVE to attack the figure, otherwise it just stands there doing nothing. Eventually, after much chasing and much attacking, a cutscene eventually triggers, revealing the figure to actually be Xion.
Now this is the part that confused me. Upon Xion lowering her hood, Roxas's reaction is to shout "Xion!" in a surprised and somewhat happy tone. Am I the only one who thinks he should have been both apologetic and horrified that he was BEATING THE CRAP OUT OF HER literally seconds before? I repeat you are REQUIRED to attack Xion in the mission, several times at that, and yet Roxas reacts like that? Why didn't he say something like "Oh my god, I had no idea it was you, I'm so sorry!" when she revealed herself?