Let us assume the opponet has a full bench in addition to an active Pokémon. Now let us assume four Pokemon are either Pokémon V or Pokémon ex and the active Pokémon is a HP 330 Pokémon ex. The remaining Pokémon consist of Radiant Greninja - who has a rule box - and Bibarel or another non-rule box Pokémon. In this scenario Zoroark hits for 240 damage, which is far off from a ohko. If Zoroark would count all rule-box Pokémon it would hit for 300 in the same scenario, which could yield a ohko with Kiéran increasing the damage output.
Thus, whether Radiant Pokßemon count toward Zoroark's damage can actually matter. In addition Pokemon may not want Zoroark as a counter to the next two- or thress-prize Pokémon they introduce after Pokémon ex. The RR cards such as ex and V sell booster boxes after all
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No I get that, I just fail to see how it would make this card overpowered. Especially when it's based on your opponent's choices, not yours.
How did the Rule Box addition make Shamin EX overpowered?
I was addressing how the failure to backwards-proof and future-proof a card like Scoop Up Net let to disastrous consequences. Then Pokémon Labs created "Rule Box", but have a hard time sticking to it.
the answer to the question of "why don't they use a much broader umbrella term for this attack than the more specific one" is quite simply that they wanted to use more specific targets for the effect instead of the broader umbrella term. it isn't a failing or a mistake when the card R&D make a decision to not use the broadest or most infinitely convenient effect text on a card, in fact. it's probably on purpose, and coming to understand why one might make such a decision on purpose or even, god forbid, why every card revealed might not be the most powerful or open-ended possible version of itself one can imagine is probably going to help ground and strengthen your "game designer" perspective going forward.
This is a lot of condescending words to use when being completely wrong.
If this card was specifically an ex-hate card - that's fine, we had a ton of these over the decades. But Pokémon Labs is adamant of using "current rulebox gimmick and previous rulebox gimmick" in the text of their attacks and many effects. On one hand, it says "we are aware that this might hit targets from the previous generation", yet they won't use a label they've specifically made for these types of cards exactly because of the problems that can arise while not using it.
When it comes to actual reasons for why they might have done it, there's a few:
a) They might consider "Rule box" to be confusing for new players and want to limit its usage to situations where it's absolutely necessary.
b) They purposefully don't want to keep to a consistent design, to make sure future cards get a power boost when they escape all effects oppressing current cards.
c) They just don't care and are applying rules randomly.
The issue here, these aren't great reasons. Consistent usage of terms leads to consistent design. I don't like cards suddenly losing power when a new set of cards is introduced that get to dodge that effect.