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Jirachi isn't available anywhere in the wild, and the -only- legit Shiny event Jirachi that even exists pre gen VI is found in Colosseum's Bonus disk, which is locked to specific natures, IVs, and doesn't have special moves. :^(
"and I have a passion for ubers that I'd like to share with anyone who wants to learn the tier."
you wanna make a mawile lovers' club? spread the mawile fetish? you evil af bro