Power Keepers was a set made in a desperate moment of Pokémon USA to launch a new US/EU set, since DP won't come till April... Although some cards are pretty cool!
They used Sugimori's art in most cards due to the lack of available art from Pokémon Company other professional artists. The ex are others, and I love the art on this one.
Type Shift is an awesome Power, though I prefer those Dual Type powers which appeared in some few cards... (no not dual type Pokémon cards... Dual Type Poké-Power).
Psychic Boom is great, not only because it has some base damage, it scales with the ammount of Energy attack to the Defending Pokémon, which can be a wipe.
Shadow Crush is also very good. Causing 60 damage (nuff to kill most Basics and few Stage 1's), it makes attach P energy useful, to take a possible Rainbow, Double Rainbow, Boost or stuff energy from a pumped up foe.
I'd use this card in a match, even if it ain't that good.