I think they're saving the alternative art symbol for when a card is released past the point it's last main set release would be rotating to keep cards from being Standard legal longer then intended. The Starter Trio GX cards were in the last couple of sets so these promos will be legal the same length of time the Base Sun and Moon copies.
It'll most likely be on any of the Full Arts coming out of that Best of XY in the Japanese version.
As for the boxes themselves: meh? I'm not the biggest fan of the Premium Collections as a whole mainly due to the less then stellar packaging that are the be flashing on display but not easy to remove.
It'll most likely be on any of the Full Arts coming out of that Best of XY in the Japanese version.
As for the boxes themselves: meh? I'm not the biggest fan of the Premium Collections as a whole mainly due to the less then stellar packaging that are the be flashing on display but not easy to remove.