how do you get the special suits in sonic battle adventure 2

To open those big stone doors that look like they belong in a ruins somewhere, (there's one in every stage.) you go to the Final Rush stage, (Or something like that.) there will be a drop part in the path. Jump onto the platforms at the very top of the drop kind of off to the side. Keep jumping on those platforms and eventually you'll come to this place where you'll have to use homing attack. At the end of all of that you'll find the Something flute. I forget what it's called. Anyway, you have to use that to get the lost chao on level one mission three.
Look for those green glowing circles and step into them. There will be a short clip, and when it's over you'll have an upgrade, like the flute.

You have to beat ALL the levels with ALL the "A" ranks in order to get each outfit for each character. The easiest -make note that I cheated- is to use Action Replay in order to get, "Tons of Emblems" and "Max Points."

Action Replay is available on ebay or amazon.

weird...cuz one time my cousin had the game and she did not have to get all a's...probably a glitch or a lucky game sega wanted to give out!