Darkness Energy is an Energy card. It is listed as Special.
Darkness Energy sits at 93/109 in Ruby & Sapphire, position 93 of 109. Before it is 92 Switch, and after it is 94 Metal Energy. The set belongs to the EX series. It was released on July 1, 2003. The printed size is 109, and the checklist is the same length. 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 Energy card.)
The illustrator line reads Milky Isobe. I count 22 other cards in the catalog with that illustrator.
Ruby & Sapphire set binder is where a full Ruby & Sapphire 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 Energy card.)
Ruby & Sapphire, in the EX series. It was released on July 1, 2003. The printed size is 109.
93/109. It is entry 93 of 109 in this checklist.
Milky Isobe. The catalog lists 22 other cards with that illustrator.
Rare.