The chaos drives come out of any G.U.N.  robot there are 4 different colors the different color changes the chaos stats.  Here are the chaos drives
Chaos Drives
Green - Raises Run 1 1/2 points each
Red - Raises Pow 1 1/2 points each
Yellow - Raises Swim 1 1/2 points each
Purple - Raises Fly 1 1/2 points each
*Note: Some people not saying any names think that the chaos drives give +8 on stats,  if that were true then it would take no time at all to get a chao to a god.  Not even the fruit from SA1 do +8 on stats they only do +4  and I dont think Sonic Team would have made it that easy for us.
Blue - Raises All Stats 1 1/2 points each (lol)
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