Just wanted to say that it's not common at all for animals to be bipedal. It would make sense for Pokemon based off of bipedal animals to be that, but not something that is a quadruped turning into a biped. I'm not saying that GameFreak has done that good or bad in the past, but still, it doesn't make sense.
https://en.wikipedia.org/wiki/Bipedalism#Bipedal_animals 