Known as Terastal Festival in Japan, Prismatic Evolutions will be released in January
There are several reasons for this, including the fact that they were the first to be released and therefore more difficult to find and collect, as well as the fact that they were more popular in their day than many of today's most valuable Pokemon cards (which have only come into existence within the past several years)
Pokmon-GX, Pokmon LEGEND, Pokmon LV.X, Pokmon Prime, and Pokmon Star: These cards often feature special holofoil treatments, combined with unique gameplay features and symbols, making them distinctive within the holographic category
Its also possible you just dont want all four Kayas Wrath in favor of other sweepers
Not only do alternative art Pokmon cards look amazing, especially when your favorite Pokmon is front and center behind a spectacular theme, but they are also some of the best cards you can pull in each set, which makes alternative art Pokmon cards sometimes extremely expensive