Shaymin

Diamond: It lives in flower patches and avoids detection by curling up to look like a flowering plant.

Pearl +2: It can dissolve toxins in the air to instantly transform ruined land into a lush field of flowers.

Platinum +4: The flowers all over its body burst into bloom if it is lovingly hugged and senses gratitude.

HeartGold +3: The blooming of Gracidea flowers confers the power of flight upon it. Feelings of gratitude are the message it delivers.

Legends: Arceus: When the turning of seasons brings the cruel winter to its end and the joyous people give thanks to the heavens, Shaymin appears and covers the withered land with flowers.