>>323821261. So that people will be forced to continue with the story rather than being able to SR for hours for a shiny.
2. Discrepancy between out of battle and in battle (e.g. it appears normal outside of it but shiny in battle).
3. They now make shiny ones into events, so that less Mythicals will need to be made.
4. Because they don't want some stuff to be shiny.
5. So that every person who gets an event Pokemon will get the same one and no kid will have a super special shiny lucky one.
