With Enhanced Radar equipped these orange squares appear on your radar. These are the hidden treasures that can be unearthed with a groundpound.

Note: As levels reuse the same maps the locations are the same chapter to chapter as illustrated below in level 1 and 2. I will only be posting the different maps from the game.

City Level 1 2 3 4:

Proud Star Level 2 6:

Proudstar Level 7:

Liberty Bridge Level 4:
Nothing hidden.

Cybertron Level 5: