I don't think it would be cruel because the timberwolves are not creatures they are being controlled by some spirit. The spirit is what is making the wood come to life. I think spike can willfully use fire. Spike can be baby sometimes....
Yeah I was expecting you guys to say applejacks for apple jack but I think Lucky Charms suits RDash because it has a rainbow marshmallow and shooting stars are fast like her. Pinkie Pie reminds me of this mascot, also hes pink like her.