Pets in King of Kung Fu are very useful and highly underrated for two reasons. First, pets increase the amount of times in which you can attack your opponent because there is another "person" on your team - you can have up to two pets in battle with you at any given time. Second of all, each time your pet is attacked this makes one time in which you are not being attacked. What this means is that even if your pet dies instantly without a chance to attack the enemy, that is saving 20+ damage points from being taken from your health. Because of this, pets are an invaluable addition to any battle strategy, even if you can only afford raccoons. Personally, I try to fill up both of my pet spots before upgrading any weapons. The strategy behind this is to get every strategic advantage spot filled before trying to upgrade ones that are already being utilized in some sense.