Originally Posted by
taozen
Thunderbird's, John Proadstar's" powers from the old Official Handbook of Marvel Universe:
On top of being a skilled hunter, tracker, and fighter (in both hand-to-hand and small arms combat), Thunderbird’s muscle tissue is three times as dense as that of a normal human’s, distributed in such a way as to give him massive shoulders, arms, and thighs.
Thunderbird can exert himself at peak capacity for several hours before fatigue begins to affect him. His skin is also extremely dense, including an additional layer of leathery epidermis, affording him heightened injury resistance. In addition, his lungs are oversized and his respiratory system is superhumanly efficient, allowing him to hold his breath for extended periods.
I remember reading that John would never get tired during the danger room sessions. I still do not think they have really officially established how strong or fast he is. I would have him have faster reflexes and speed than Jimmy. Give Jimmy the power and give John the speed advantage.