These cards stop the opponent from attempting to take specific actions during a match, and they can essentially win a game instantly against the right matchup
Its a good one too, allowing you to search your deck for up to three Stage 1 Pokmon, then reveal them and put them in your hand (dont forget to shuffle your deck after youve done so!)
Like most Pokmon cards, the value of Tapu Koko depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Darkness Ablaze)
Overall it is probably worse than Wrench Mind in the discard department
These cards are extremely expensive
Putting punisher effects onto effects you already want, like card and mana advantage, really keeps the deck ticking