Double Rainbow Energy is an Energy card. It is listed as Special.
Double Rainbow Energy sits at 88/100 in Crystal Guardians, position 88 of 100. Before it is 87 Potion, and after it is 89 Aggron ex. The set belongs to the EX series. It was released on 1 August 2006. The printed size is 100, and the checklist is the same length. The listed rarity is Rare.
The card text says: Double Rainbow Energy can be attached only to an Evolved Pokémon (excluding Pokémon-ex). While in play, Double Rainbow Energy provides every type of Energy but provides 2 Energy at a time. (Has no effect other than providing Energy.) Damage done to your opponent's Pokémon by the Pokémon Double Rainbow Energy is attached to is reduced by 10 (before applying Weakness and Resistance). When the Pokémon Double Rainbow Energy is attached to is no longer an Evolved Pokémon, discard Double Rainbow Energy.
The illustrator line reads Takumi Akabane. I count 51 other cards in the catalog with that illustrator.
Crystal Guardians set binder is where a full Crystal Guardians set goes. This card fills one slot there. I still need this card.