Weaknesses.
Fire's Strengths
Earth and Ice
Fire's Weakness
Water

Earth's Strengths
Water
Earth's Weakness
Fire

Water's Strengths
Fire
Water's Weaknesses
Earth
Storm

Storm's Strengths
Water
Storm's Weaknesses
Ice

Ice's Strengths
Storm
Ice's Weaknesses
Fire
That's it, now you'll know which pets to use against which opponents. Use the right pets to strengthen your attack!