To unlock this trophy, you must find all 6 Claptrap statues and
activate them. You will know you did it when a speech bubble pops up. Below are the locations for each statue:
1) Hyperion Dump. Against the wall to the left as you enter.
2) Sanders Gorge. At the start of the main path.
3) Dividing Faults. At the start to your right as you go down the stairs.
4) Scorched Snake Canyon. At the start in the left corner.
5) Tartarus Station. In middle of winding path leading to Wayward Pass.
6) Wayward Pass. Along path as after killing Knoxx-trap.
Additionally, here's an excellent video showing each location. Credit goes to Yoteslaya.
Happy Hunting :)