Scrap Victini was from a Japanese event that you had to collect some merchandising and you could exchange it for some rare pokemons. Sadly my Scrap Victini is pretty more valuable than what you have, as I suppose your Jirachi is from the recent HongKong event, right?What does it mean by scrap victini? What do u want for that mew?
And I would trade you my Shiny Mew for your Diancie if you want.