No quite. It's important to use the right words here.
Old "Pokemon Powers" affect both Poke-Powers and Poke-Bodies.
An effect that blocks Poke-Powers will only block old Pokemon Powers if there is ALSO an effect in play that blocks Poke-Bodies too!
This is covered in old versions of the Compendium. I suggest, that if you are playing mixed formats or unlimited, that you check those out.
You can find all the old version in the link up up, over toward the right hand side. The gray box that says "Compendium Rulings".