Excellent, thanks for that. I recently bought a Turtwig to go in my deck because of that skill. It is quite a potent little skill as saving energy is high priority in the game I find. Thanks very much.
It is also handy as you can up the damage depending on your opponent's weakness, even if you don't have the energy to power it that type of Pokemon.
I shall have to see what other Pokemon have that trick up their sleeves.