You may choose a permanent card among them, reveal it, and put it into your hand
Graded Population Report: Sleep
You can only do this once per turn, but that can be enough sometimes to make sure you get a knockout this turn or even set up damage for later in the game
God-Eternal Bontu God-Eternal Bontu has Reprocess as an enter the battlefield ability, in addition to menace and its own built in recusion
Even though Ghoulcaller Gisa isnt herself a Zombie, her activated ability can really crank out more and more Zombie tokens as the game goes on
You can make it harder if you prefer, perhaps looking for a full-art version of every Pokmon (although its worth checking theyve all received one first sniff , poor Mantine), or go far easier and choose Gen VI which only has 72 monsters to find