2 times! One as a kid, then again when on memory lane. The kid story is not as good and has no detail, while the adult occasion is a better story but had good odds since it was a box.
As a kid I was so fortunate to have shadowless out on the east coast. My first cards were shadowless and I would beg mom to take me to this little sundries shop reeking of incense and various aromas of wood and flora. Like a treasure shop or sorts, random base boxes at the counter and no other sets even in later months/year. I had pulled many holos, but shadowless charizard was one of ‘em! It was incredible but blastoise was my fav 
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Funnily enough my OP from my collection thread shares the story of my adult pull that I’ll just leave there to read. Pretty amazing story, it being the last pack!
Edit: also funny this was 2013 same year as ftw below. Was a good year to take a ride with it being one minumum wage paycheck for a box 