Darkness Energy is an Energy card. It is listed as Special.
Darkness Energy sits at 86/106 in Emerald, position 86 of 107. Before it is 85 Wally's Training, and after it is 87 Double Rainbow Energy. The set belongs to the EX series. It was released on May 1, 2005. The printed size is 106. This checklist is longer, at 107 cards. The listed rarity is Rare.
The card text says: If the Pokémon Darkness Energy is attached to attacks, the attack does 10 more damage to the Active Pokémon (before applying Weakness and Resistance). Ignore this effect unless the Attacking Pokémon is Darkness or has Dark in its name. Darkness Energy provides Darkness Energy. (Doesn't count as a Basic card.)
The illustrator line reads Milky Isobe. I count 22 other cards in the catalog with that illustrator.
Emerald set binder is where a full Emerald set goes. This card fills one slot there. I still need this card.
If the Pokémon Darkness Energy is attached to attacks, the attack does 10 more damage to the Active Pokémon (before applying Weakness and Resistance). Ignore this effect unless the Attacking Pokémon is Darkness or has Dark in its name. Darkness Energy provides Darkness Energy. (Doesn't count as a Basic card.)
Emerald, in the EX series. It was released on May 1, 2005. The printed size is 106.
86/106. It is entry 86 of 107 in this checklist.
Milky Isobe. The catalog lists 22 other cards with that illustrator.
Rare.