This is a skill point.
Firstly, Batalia is the level with the rain and destroyed city. Secondly, if you don't know what a sand mouse is, it is the little robot that clank can tell what to do. You need have the Sonic Summoner in order to summon the mouse. I advise completing the entire level but ignoring the tanks, this way the mouse will not be distracted by other enemies. The mouse is found at the very start of the level near you ship, it is on a upper ledge by the building on the right. There are 4 tanks on Batalia, so not many. Firstly bring the mouse down and allow him to kill the first tank, now let it kill the other one on the other side of the bridge, that is two destroyed. The last two tanks are at the fort area near the end, an easy way to reach it is bring the sand mouse in the taxi with you to reach it quicker. The mouse has a timed life so be quick, but if it does disappear then just go and get another one. Once the sand mouse has killed all 4 tanks the skill point and the trophy will unlock.