Other known variants
+30
-20Super Connectivity
Once during your turn (before your attack), you may search your discard pile for a Lightning or Metal Energy card and attach it to your Active Pokémon. Then, put 1 damage counter on that Pokémon. This power can't be used if Magnezone is affected by a Special Condition.
Gyro BallYou may switch Magnezone with 1 of your Benched Pokémon. If you do, your opponent switches the Defending Pokémon with 1 of his or her Benched Pokémon.
It evolved from exposure to a special magnetic field. Three units generate magnetism.
What happens if I use Bronzong's "Gyro Ball" attack but I don't have any benched Pokemon?
You have to switch Bronzong if you are able to; the "if you do" part refers to when you have no Benched Pokemon. So if Bronzong doesn't switch the opponent's Active Pokemon doesn't switch either.
The version of "Gyro Ball" attack on Forretress says "you may switch..." as an optional action, but the version of "Gyro Ball" on Ferrothorn indicates the switching part of the attack is mandatory. Which way is correct?
The effect may vary from card to card, so you should play each attack as it is written on its card. So for Forretress the switch is optional, but for Ferrothorn it is mandatory.