In the Pokmon TCG, a Pokmon with a Weakness (found at the bottom of their card) takes double damage from attacks of that Weakness type
The end result is a more tempo-oriented deck that can play the control seat by utilizing recycled characters, but also close out games quicker than pure control
Having "rotating" cards in it is fine, especially since some of them might end up not actually rotating
The main support Pokmon needed would be Gardevoir , whose ability " Psy Shadow " allows you to take one extra Psychic Energy from your Energy Zone to put on the active Pokmon
Combine that with gorgeous artwork of her and a cute and popular Generation One Pokemon like Clefairy, and it's a nasty recipe for a chase card
While NM copies can be had for around ten dollars, this card continues to sell well, climbing up toward the $20 mark when in nearly pristine condition