Like in the movie, Jirachi will grant your wish, but the wish has a consequence! The person above you will make a wish, and you must create a consequence from that wish. (Example would be how Jirachi materialized chips and snacks, but the chips and snacks came from someone’s shop, which was morally wrong by stealing.) You can get as creative as you want with your wishes and corruptions, I’ll start it off with something simple;
I wish I had a jelly filled donut!