Pet Stat Calculator
Growth Potential of a pet potrays its status when it reaches level 100. Every level a pet gets 1% of its growth potential on every stat, plus 1 stat point that you can distribute freely. When a stat reached 255, you can no longer distribute the free stat to it, however it will continue to grow by the growth potential, exceeding 255 points. The number in blue is the maximum points you can distribute to that stat before it reaches 255.
A pet's stat calculation is like a char's stat calculation. A pet cannot wear any armor, nor other equipments. It only wears a weapon. A pet's Attack Power is its weapon attack. It started at 1 point and randomly increases when the pet gains a level. This number is capped by 2×current character level cap
For a more comprehensive guide on pet system, please refer here