>>47449938Nothing counts against anyone - people are just mad that others are having fun lmao.
If you want to seek to be a better writer and character creator - especially within a fandom, then yes it is "typically" frowned upon to have a character do things or have things happen to them that are viewed in universe as miracle happenings like catching and exclusively meeting shinies and being able to talk to Pokemon and winning every battle and yadda yadda yadda, typical mary sue crap.
That said, given that multiple Zygardes seem to exist and its always split into its cells then I can't see why this couldn't happen. Plus, if its within the confines of your own story which is, well, a story, then you can have whatever happen in it.
Just have fun yo. And I'd like to learn more about this character - when did they meet the Zygarde Core and how long have they been travelling?