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More than likely due to this project needing more animators.
On a completely different note, I believe shiny Mega Pidgeot is still missing. Well not any more!
I noticed a few Pokemon were missing their shiny forms...
Shiny Hoopa Unbound made from TrainerSplash & aXl Hoopa
Shiny Gourgeist (All sizes) Made from RedRooster/PoM/Wobblebuns original sprite. (I really don't know who to credit for this one XD)
I also have noticed that the link for Fairy...