Strong Card (Japanese: ストロングカード) is the second type of AK cards, is used to boost the power of animal's three attacks - Guts, Technique, Power. It generaly has a green color scheme. The power boost varies for each card. Strong cards are needed to enable an animal to invoke "Gold Change" when using their best attacks. This is done by raising the level of the best attack of an animal by five stages. Additionally, some Strong cards also give aura effects to animals.
Strong Card was replaced by Friend Card after the launch of GAK.
