Cadderly here.
I already told this in chat, but why not let everyone know For me the most insane moment was the first two Missingno giveaways in twitch, during the dxp weekend.They were of very great fun, but Missingnos also turned the Vortex economy around for a short while I guess the dxp were what made it happen: most noobs new ppl, including me, tought that there will be only 2 giveaways in total and Missingnos wouldn't be given out after dxp weekend ends. When late at night between Sunday and Monday the weekend (and assumingly the giveaways) was about to end, there were only about 20 of each Missingno type in game. I was lucky enough to own 1 shiny one by then. So, I guess their value was for a short time higher than any other event's had ever been. There was a guy (or maybe a girl) asking shiny volcanion and shiny santapie for their shiny missingno. I managed to trade my shiny one for a mystic santapie, which maybe wasn't the fairest possible deal either But well, that dxp weekend was the most insane (also the best) memory for me in Vortex.