Shaymin would make a great coloring page because its bright and cheerful features would make it perfect to color! Its white collar and red bowtie would make a nice accent color to any page. You may want to go with earthy tones for the leaves on its head and light yellow, pink, or peach for its wings. The two tufts of grass could be done with varying shades of green, and its big blue eyes could be colored with a light blue to really make them stand out. For its small mouth and cheeks, a light pinkish-brown would look great; it will help to add contrast to all of the brighter colors.