Other known variants
x2
-30ScratchLost MineYou can use this attack only if you have 10 or more cards in the Lost Zone. Put 12 damage counters on your opponent's Pokémon in any way you like.
This Pokémon is feared. When its gemstone eyes begin to glow with a sinister shine, it’s believed that Sableye will steal people’s spirits away.
If my opponent uses Mime Jr's "Mimed Games" attack and they don't have enough cards in the Lost Zone, can I choose Sableye's "Lost Mine" attack and if so what happens?
No, you may not choose that attack, you must select a different attack.
If I have 5 cards in my Lost Zone and my opponent has 5 cards in their Lost Zone, can I use Sableye's "Lost Mine" or Giratina VSTAR's "Star Requiem" attack or Fantina?
No. Each player has a separate Lost Zone above their Prize Cards that they put cards into. You yourself must have 10 cards in your Lost Zone in order to do either of those attacks or to play Fantina.