Gyro Blade

is this a good pokemon team for pokemon diamond?

darkrai-dark void, nightmare, dream eater, and dark pulse
mewtwo-ice beam, psycic, aura sphere, and energy ball
feraligatr-surf, ice beam, super power, and dragon dance
gallade-psycic, close combat, calm mind, and leaf blade
magnezone-gyro ball, lock-on, zap cannon, and thunder bolt
gengar-substute, shadow ball, desteny bond, and focus blast
by the way the [...]