This achievement seems very buggy or the achievement description is misleading.
This takes place on the first level of the Toy Story world called Day Care Dash.
I don't remember when you get the missiles, but according to klobeast, you don't unlock the missiles until the third mission.
There's a total of 5 boxes to destroy:
1right behind you when you load up the level.
2 in the first playground area (one to the left when you enter the area and one on the right when you enter the area; near where you have to pull the rope).
2 in the second playground area (one in the back left corner near the sunflowers and one in the back right corner against the wall).
It will unlock immediately after you destroy all 5 boxes and not at the end like most achievements in this game!
If your achievement gets stuck at 80%, try Sol76 solution in the comments of klobeast solution post!
"-Play the level and meet the requirements.
-End the level the normal way by completing it and collect your points.
-Quit to home and quit game.
-Restart the game , replay the level and shoot all the boxes."
I used his method, but also tried my method of not taking any damage throughout the level from the first box to the very last one so I wouldn't lose any coins that were in the boxes!