Pajamas
<a href="http://pokegym.net/forums/showpost.php?p=
Compendium Lv.X said:Q. Could I play a trainer if it's obvious that it will have no effect (i.e. Life Herb on a Pokémon without any damage and with no Special Conditions on it)?
A. No, you cannot play a card if it is obvious that you cannot do what the card is supposed to do at that moment. (Sep 22, 2005 PUI Rules Team)
Solrock CatS said:body: Heal Block
If you have any Lunatone in play, neither player’s Pokemon can recover any HP.
Translations could be wrong, Japanese rulings aren't necessarily applicable elsewhere, etc. That being said, if this ruling were to stand, would it be the first case where you're allowed to play a trainer from your hand when it's known to have no effect?Clash at the Summit FAQ said:Q: Can I use a “Moo-Moo Milk” (HS) Trainer card in my hand while Solrock’s “Heal Block” Poke-Body is working?
A: Yes, you can use it. However, your Pokemon can’t be healed.
Q: Can I use a “Potion” Trainer card in my hand while Solrock’s “Heal Block” Poke-Body is working?
A: Yes, you can use it. However, you can’t remove damage counters.