Always store foil cards in appropriate sleeves and rigid top-loaders or graded slabs to preserve their value
Alolan Vulpix has long been adored by fans, and its rainbow rare version is a true collectors delight
These cosmetic effects are entirely optional, and just a perk for getting duplicate cards
To be fair, when Cube was a new concept, there were general guidelines for this sort of thing that curators generally followed
Since most sports cards use the same dimensions, standard sports card sleeves are generally compatible with Pokmon cards
To explain flavor text from the technical point-of-view, it is the italicized words near the bottom of a Magic card that have nothing to do with the actual rules text of the card and does not impact game play in any way (outside of Un-sets, God bless 'em)