Leave the GUN HQ and head southeast to the center of town. Talk to the GUN agent by the streetlight, then go south and grab the 8 rings around the center lamppost. Go southeast now under the hanging lights and talk to the man by the sky blue car for a Side Mission. Heal again at the workshop, then take the blue pipe back to the rooftops. Before you go to the area where the wasps were, use Tails or Rouge to fly to the glass roof you zipped past earlier. Jump down to the last section, then jump up to the roof with the springboard on it to find 3 rings and a Chao Egg.