Well there goes that dream! I do not have the tools or time for RNG-manipulation. Although while I am here I am looking for a shiny female zorua, male shiny pawniard, shiny male froakie, shiny cleffa, and shiny alolan meowth. I have breeding parents set aside already for desired egg moves and natures. I am trying to do a semi-nuzlocke of Ultra Moon with only shiny Pokémon. Once all shiny Pokémon are gone, the run ends. I have a shiny salazzle, ludicolo, and a few other shinies I am willing to trade in exchange for these. I do want these baby Pokémon nicknamed but I will put that in a separate post. Thank you all and sorry for the long post.you cannot nickname event pokemon from past gen in generation 8
This method (i am sure it applies to other gen too, but gen 7 is the most common)
Is to RNG-manipulation the OT of the event pokemon, the Trainer ID of the pokemon AND the Secret ID of the event pokemon, and then you can nickname it.