When search "sky form" in Japanese sites, one blog page was hit recently. Blog owner is Pokemon fan and working for the printing industry, based on previous articles.
Article on 19 May says :
- Land form is current one as we know
- Glanced Shaymin sky form in the office carelessly
- Surprised at Shaymin sky form, same feeling when saw Darkrai's legs
- Shaymin sky form is sort of "failed of eevee evolution" or kind of Delcatty and eye is like Girafarig
If want to check AAPF's article about Shaymin forme, please refer to Shaymin Forme Info.
[ Reference ]
Blog Ume no mi (Unripe Ume fruits) : 19 May Article