Smash Box
From the Croc Wiki, the Croc encyclopedia
Smash Boxes are recurring elements within the Croc games, appearing on nearly every level. The only way of finding out what is inside is by smashing it open, hence the name. The '?' that appears on the side faces reflects the fact that the player has no clue what is in the box until it is opened.
Contents
The contents of smash boxes vary from level to level. This list shows what could be contained within the boxes. It is by no means complete.