These full-card art secret rares go above the standard numbering and show a unique rainbow hexagon symbol on the bottom to further distinguish them
There are also cards that needed to be censored and edited for rereleases, especially in different regions
For reference (based on your pictures and on the cards I can see more clearly): Impoleon is PO (creased cards = poor) Granbull PL (heavy played, has destroyed corners/peeling) Dialga LP (played with bad corners but not destroyed) Lepumentas/Rasaff GD
Wizards Black Star Promos Pokemon cards can be a solid investment, especially rare cards in mint condition
This, ultimately, prevents many powerful Pokmon cards from being able to knock out Mimikyu at all, although it is not impossible to find a workaround to defeat it
Red mages tend to be at their happiest when they're attacking on turn one, and these are the two best aggressive creatures in the format