Magnet Mines

Magnet mines are relatively small, self-powered electromagnets, used (at the moment) exclusively by Crash the Wolverine. When activated and thrown they attach to metal objects (including robots), magnetizing them as well, and causing them to be pulled into other metal objects, or causing other objects to be pulled to them. These mines can hold up to 300 lbs of metallic objects before they are no longer capable of attracting anything else, and when activated, only have enough battery power for 5 minutes of use.

It's unknown how many of these devices Crash carries, but it can be presumed he has enough to last him. … Or that he just doesn't use them often, since trying to retrieve them would be tricky.