You all might have heard from this card, most of the times it is called the ‘Bubble Mew’. This artwork of this card is only released in Japan during 7th World Hobby Fair held in December 1997. The card itself had to be peeled from a sheet similar to the cards from the Vending Series. Since the card shares the same symbol as the Vending Series as well people like to see this as an addition to that series.
Japanese – World Hobby Fair 1997

There was a second release of this card later on January 1st 1999 as a promo card included in the Pokémon Best Collection CD. Besides a different shade of purple the card is similar to the one from December 1997. In my own collection I got a very descent miscut as well which a friend of my has pulled from one of the CD’s.
Japanese – Best Collecton CD

Thank you
~Lof102