I understand the need to make earning cards difficult, but WINNING 33 games is a little much. I think it should be more of a 5-7% chance especially since even after 33 wins you may still have not won a card.
random decks often give Tafari a rock which causes damage to anyone who switches out. unfortunately Tafari's effect prevents opponents from switching so it puts Tafari at a disadvantage
I don't think they should regain energy when they switch out because if the opponent doesn't catch the swap then you can successfully swap positions while GAINING energy. This can change the tides of the battle too dramatically.
pretty annoying, but I hafta give you props for coming up with so many challenges. nice job I beat the whole thing and the last lvl was my favorite. 3/5