This is a Ruling that is really starting to get under my skin. The context is "Can Zoroark use Foul Play to copy Reshiram's Blue Flare attack without discarding the energy?". It's baffling to me that the ruling is yes, when there are two rules that work together in the compendium that completely overturn this ruling. The first is
"If an attack requires the discard of an Energy card attached to the
Attacking Pokemon, that discard must be fulfilled or the attack fails.
(Jan 31, 2008 PUI Rules Team)"
All this proves is that Reshiram has to discard the energy. But there is another rule that obviously connects these two and has direct relevance to the situation.
"When a Pokemon refers to itself by name, interpret that card as though
the text reads "this Pokemon". This has the practical effect of not
including other Pokemon of the same name. If a Pokemon copies that text,
it refers to itself, not the original Pokemon"
If Zoroark uses Blue Flare as his own, then the effect of the attack comes through as well. This changes the "This Card" to Zoroark, effectively telling you to directly discard 2 fire energy from Zoroark. If you can't do that then the attack fails, I have absolutely no idea how the ruling can be anything but that.
Also there is a ruling, exactly like this in the compendium:
Q. If Clefable metronomes Latias-EX's "Power Crush" attack, what happens if there are no Fire Energies attached to Clefable?
A. Clefable can copy the Power Crush attack without having any Fire Energy to discard as long as the Defending Pokémon is not Knocked Out by the attack. If the Defending Pokémon was Knocked Out and you cannot discard 2 Fire Energies, then this attack does nothing. (Jul 19, 2007 PUI Rules Team)
Exact same situation, Clefable's attack fails if the attack calls for the discarding of energy and Clefable can't do it. Clefable can only avoid discarding the energy if the attack doesn't call for it.
"If an attack requires the discard of an Energy card attached to the
Attacking Pokemon, that discard must be fulfilled or the attack fails.
(Jan 31, 2008 PUI Rules Team)"
All this proves is that Reshiram has to discard the energy. But there is another rule that obviously connects these two and has direct relevance to the situation.
"When a Pokemon refers to itself by name, interpret that card as though
the text reads "this Pokemon". This has the practical effect of not
including other Pokemon of the same name. If a Pokemon copies that text,
it refers to itself, not the original Pokemon"
If Zoroark uses Blue Flare as his own, then the effect of the attack comes through as well. This changes the "This Card" to Zoroark, effectively telling you to directly discard 2 fire energy from Zoroark. If you can't do that then the attack fails, I have absolutely no idea how the ruling can be anything but that.
Also there is a ruling, exactly like this in the compendium:
Q. If Clefable metronomes Latias-EX's "Power Crush" attack, what happens if there are no Fire Energies attached to Clefable?
A. Clefable can copy the Power Crush attack without having any Fire Energy to discard as long as the Defending Pokémon is not Knocked Out by the attack. If the Defending Pokémon was Knocked Out and you cannot discard 2 Fire Energies, then this attack does nothing. (Jul 19, 2007 PUI Rules Team)
Exact same situation, Clefable's attack fails if the attack calls for the discarding of energy and Clefable can't do it. Clefable can only avoid discarding the energy if the attack doesn't call for it.