What is R Energy?
R Energy is a Special Energy that was used in the Pokémon Trading Card Game (TCG). It has only been released once – in the EX Team Rocket Returns set of 2004.
See also: What are Special Energy Cards?
The R Energy card provides two Darkness Energy but can only be attached to a Pokémon with Dark or Rocket in its name. The card design features two Darkness Energy symbols.
In the Pokémon TCG, a player can only use an Attack Move if the specified number of Energy are attached. This specified number generally includes one or more Energy that corresponds to the Pokémon type, and / or a number of Colorless Energy. R Energy Cards provide two Darkness Energy when attached to a Pokémon with Dark or Rocket in its name.
R Energy Card Text:
The text on the card reads: ‘R Energy can be attached only to a Pokémon that has Dark or Rocket’s in its name. While in play, R Energy provides 2 
Energy. (Doesn’t count as a basic Energy card.) If the Pokémon R Energy is attached to attacks, the attack does 10 more damage to the Active Pokémon (before applying Weakness and Resistance). When your turn ends, discard R Energy.’
Gallery
R Energy Card 95/109 from EX Team Rocket Returns
