That card is from the Emerging Powers set. It's the better of the two Gothitelles. In addition to Madkinesis 30 damage plus 20 additional damage for each Psychic energy attached to Gothitelle), she also has Magic Room, which prevents your opponent from playing Item cards while she's your active - shuts down big cards like Pokémon Catcher or Junk Arm.
Add a Gardevoir from Next Destinies (whose Psychic Mirage Ability makes any Psychic energy attached to a Psychic Pokémon count double), and Madkinesis get's ugly very quickly.
Just watch out for Mewtwo EX - with all the energy she'll have attached, and Psychic weakness, she's a 'one hit/one kill' for him!