Other known variants
x2Tail CodeMove an Energy card attached to the Defending Pokémon to another of your opponent's Pokémon.
Snap AttackIf the Defending Pokémon has any Energy cards attached to it, this attack's base damage is 20 instead of 60.
May I use Ambipom [G]'s "Tail Code" attack if my opponent only has an Active Pokemon and no Benched Pokemon?
Yes you can, although it won't move or discard the energy. There must be a Pokemon on the bench or you can't move the energy off the defending Pokemon.
If I use Ambipom [G]'s "Tail Code" attack to move an energy card from the Defending Pokemon to one of my opponent's Pokemon that has an Unown-G attached to it, what happens?
While Unown-G prevents the attachment of the energy to the protected Pokemon, it does not prevent the removal of the energy card from the Defending Pokemon. The energy card is discarded.