It would be so cool if you could buy talents for your pet. You would have to pay a small amount of gold or crowns to "teach" your pet the trick. So like if you had a firecat, and it had bomb, and you wanted it to learn banana peel, you could pay for your firecat to learn banana peel for a small fee of crowns or gold.
No. I would say no. In real life, you can't just buy talents and train your pet. You have to train them and take good care of them, just like dogs, fish, cats, etc. If you learn it permanently, the pets would be boring. Yes, it would help in combat, but it would make the game WAY too easy.
KI already nerfed most of the game. I really wanted to see some cheating bosses in the game, but it turned out that most were weak.
Now, if it were a treasure card, the price shouldn't be so small. Also, the treasure card must have the pet to be a certain level to use them, Adult, Epic, etc. That would be a better idea.