A Grass Type Legendary Pokemon that is able to change form when it is near a Gracidea flower.
In their land form, they resemble a bundle of Gracidea flowers and when happy, more flowers bloom on their green plant like fur.
When in Sky form they resemble a small dog with two red petals on their necks and their green fur spikes into a sort of hair style. Their ears become longer and their paws are green.
Shaymin are timid in their Land form, not liking to fight and usually hide from others. However in their Sky form, they gain courage and confidence, and they can be strong fighters. Its also been shown that Shaymin has vanity as the one from the movie has shown some of these traits.
Its signature move is Seed Flare. When Shaymin absorbs toxic or bad fumes, it purifies the toxins and releases them in an explosion of light. Depending how bad the toxins are, the explosion can vary in size but it has been shown that strong fumes can destroy a large portion of an area as a forest was shown in the movie and possibly be able to cause more damage.