Charizard was especially useful, as it could be powered up in a single turn via Double Colorless Energy and Blacksmith, and then with a Muscle Band, it could take out any Yveltal-EX or Thundurus-EX that was causing problems
There is also the useful Metal Magnezone (DP1), which can give a free Retreat Cost to your allies with Metal Energy, allowing your Pokmon to move around your board however you like
This means that you could steal a tutor or a counterspell from an opponent, or you could just copy one of your own spells for twice the fun
Kamahl's Druidic Vow is in the same camp
Granted, you can only equip a legendary creature with it, but I dont think thats much downside these days
This is because many errors and examples of manufacturing defects have recently begun to appear in the production of Pokmon cards