Pleaselog inorregisterto add a comment.
Hope I helped. :)Source
I’m not sure if you’re asking what the ID’s of those Pokemon are or what an ID is in general, but every trainer has an ID and a secret ID, as well as the Pokemon they catch or breed. The secret ID determines if the Pokemon is shiny or not.
While it is common knowledge that each trainer has an ID, it is somewhat less known that he or she also has a Secret ID which is hidden away. Like the Trainer ID,this Secret ID is also recorded on each Pokemon a Trainer captures or breeds.This Secret ID is used in the equation whichdetermines whether a Pokemon is shiny or not.
Source
Hope I helped.
Different event Pokemon have different secret IDs as listedhere.That link may be old but it shows the secret IDs of some event Pokemon and that they are not the same.
Hope I helped!