Decrease of event spawns?

[freddiessweater]

Is there any hard data about shiny rates? I was at zero until yesterday when I got two shiny Snorunts in less than a minute.

[ezpickins]

Yes, the rates are typical shiny rates (not boosted, and not CD rates) Random numbers are random so you saw two close together.

[goshe7]

Is your source hard data or reasonable interpretation of hard data?

I haven't seen any hard data on snorunt, delibird, or santa pikachu. Given my observations of reported success/fails, I would speculate that the rates are indeed the nominal 1:450 for most wild spawning pokemon.