The Cosmog line is one of the most interesting in Pokemon history. This is mainly because it is one of the only legendary Pokémon to have evolved,
Both Dratini and Dragonair have serpentine designs with small feathers or wing-like appendages on the sides of their heads.
As a general trend that has yet to be broken, it seems that the final development of a fire start will always be bipedal, regardless of how many legs its previous iterations ran.
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