Here is one: Have a Haos bakugan with low gs ( 300 or 400 ), a Shiny Devil ability card, a Magma Fields gate card, and a Magnetic Action ability card. Set the weak Haos bakugan on Magma fields. Hopefully your opponent will roll a bakugan that is 200 gs higher. If your opponent doesn't roll on your card, then use Magnetic Action. Magma fields Doubles ability card bonuses to the lowest printed g-power bakugan, then you use Shiny Devil. As long as your opponent has 200 or more gs higher than yours, you will gain an extra 800 gs.