Guys, this are the first starters of my dinosaur era-based region! I need names for them!

Please, constructive but sincere criticism. I know the photo isn't very good.

first evolution is a playful little dinosaur. Then he evolves and get a steel type, because now he uses the leaves on his tail as a razor sharp blade for combat. The final evolution has now his tail blade even more powerful, and even his crest became a sharp weapon.