Fragment events stack on top of regular events, if the global event is x2 shiny a x2 shiny fragment will = x4 shiny in that fragment area.
Some spawns are Immune to fragments and global events such as Shiny-locked pokemon (e.i pokemon that are always or never shiny)
Mew is 5 times more likely to spawn
Rates and Values:
Shiny rates calculator:
How it works:
Enter the spawn rate of a Pokemon for example for 1/1000 rate pokemon enter the value "1000" into the Custom Spawn Rate input, it will use the Shiny rate to calculate the odds of finding that pokemon in shiny form. (Rate * Shiny)