I found a Giratina (Origin) In the "Defeat the above with a single word" Fourm. Sadly I was out of Pokeballs so I couldn't catch it ; - ; https://lakevalor.net/threads/defeat-the-above-with-a-single-word.8813/page-39
Just spotted (and missed) a Shiny Origin Giratina in Question and answer. Sadly I have no screenshot of it (Edit was to add the Origin cause i forgot to say it earlier)