Lost Chao Locations
Locating the Ancient Ruins:
Right before the second checkpoint, you can see the Ancient Ruin next to two black containers and one wooden container.
Finding the Lost Chao:
Activate the ruins with the Mystic Melody and a trail of rings will appear. Use the Air Shoes to light dash round and it will take you to some floating platforms with the homing attack lifts. Use these and it will lead to another area with two rapidly firing G.U.N. robots. Avoid the spiked ball to find a way up to the next level, and the same again to reach the Lost Chao.