Bakugan: Defenders of the Core

Once again, you can get this trophy against an unmanned second controller. If you choose to use the CPU, put it on "Easy." Either way, crank the time up to 300 seconds. While I was able to get One Man Army with the CPU, for Wrecking Ball it really is advantageous to use an empty controller, seeing as how you're racing another Bakugan to destroy crystals. Once again, you also get double points in the closing seconds. Kill enough crystals to get 500 points in 300 seconds.