As a program, it should never be confusing for a player to play this game.
When you have cards like Slowking which has a clearly written errata that says they can only use their Pokémon Power when in the active and it’s stamped “Errata”, it needs to work like the card says.
No player is going to know that isn’t supposed to work a different way if the text doesn’t say that. It’s illogical.
Please make Unlimited follow Errata rules.
(Also, I actually play Unlimited, so if anyone is against this, please be sure you actually play the format.)