Ok, so I recently got a shiny Articuno and I was very excited until... I threw it out. The model was the literal copy of the regular Articuno and the only clues that it was shiny was that it had some small blue particles near it, it was enchanted in my inventory, and it said shiny when I hovered over it. I can attach image files if you would like to see it for yourself. But, please give it a different (and hopefully more cool) model than the regular Articuno.
Our shiny models are based on the real game Shiny Articuno. So there is no way we can make them look better. However, PokeFind made Aura Eggs to give the pokemon a preferred texture that looks much cooler!