Pokemon, what happened to you?

[Chaoxys]

4 starts during 2, as the Red Gyarados problem begins.

I thought that too, but Lake of Rage has a ton of Gyarados in it, and since red Gyarados is his shiny color, it could just be another one. If anything, 2 is a little after 4 because I remember reading somewhere that in HG/SS's Arceus event, you see Cynthia and she states that she was the Pokemon champion. If this is true then that means that it would take place a bit after 4.