Quagsire has just been revealed from SM6a Dragon Storm, which will be released in Japan on April 6th. Thanks goes to Bangiras for the translation!
Ability: Wash Out
As often as you like during your turn (before your attack), you may move a [W] Energy from 1 of your Benched Pokemon to your Active Pokemon.
[C][C][C] Hydro Pump: 60+ damage. This attack does 20 more damage for each [W] Energy attached to this Pokemon.
Weakness: Grass (x2)