Unfortunately, I see a huge weakness to Reshiram in this deck, due to all of you main attackers being weak to it. You're going to have to remove some things for a Fire counter that can keep itself going, so I see a few changes that may be necessary for you to use.
First off, the only combo I see here is between Steelix Prime and Klinklang. Cobalion doesn't really mesh into the deck as well as you might think it does, because the main focus here is to tank with Steelix and heal it off with Max Potion, and with some good support, it can be quite easy to pull off. I'm going to suggest that you remove the Cobalion; as much as it can help with Iron Breaker, it is just too easy to play around, and will end up costing you 3+ Metal energy, depending on how you use it. I don't see much of a use for Pichu and Cleffa either, since as long as you bump up your Pokemon Collector and PONT count, you should be fine without them.
The card I think you should use to counter Fire types like Reshiram to give this deck a fighting chance is
Samurott BW(yes I know it's the promo, but the regular and promo are the same besides the artwork and set #), and it helps for a variety of reasons. First off, Samurott counters Reshiram and other Fire types due to its Water typing, and its Ability lets it survive a Blue Flare (which puts you at a 2:1 prize rate). Plus, it functions off of Colorless energy, so you can still use Metal energy (and not have to tech in extra energy). So, concerning Pokemon, I think this could be justified:
- 4 Cobalion NV
- 1 Pichu HGSS
- 1 Cleffa HGSS/CoL
+ 2 - 2 - 2 Samurott BW
This way, you can keep yourself in the game against matchups like Reshiram, where Steelix handles almost everything else it could encounter.
Now that you have your Pokemon figured out, and now that we can focus on the Klinklang and Max Potion strategy, we can take out 2 of your Switch, since you obviously don't need it when you can continue to heal off your Active Pokemon with Max Potion. I don't know if Twins is really necessary for this deck, since this deck can continue taking prizes with Steelix/Samurott once they are set up. You may want to add an extra Communication and Collector, so everything is easy to get out when you need it, and another Rare Candy is needed because of the addition of Samurott. Also, you really don't need 3 Rocky Helmet, due to its dead weight later in the game. Other than that, I think you did a really nice job figuring out the T/S/S for this deck, so props to you. For the changes I mentioned, here's what might benefit you:
- 2 Switch
- 1 Twins
- 1 Rocky Helmet
+ 1 Max Potion (necessary to keep all of your Steelix alive as long as you can)
+ 1 Pokemon Collector
+ 1 Pokemon Communication
+ 1 Rare Candy
For the energy, you may want to remove two Basic Metal, since you already run a 4/4 split of Special energy, and if you want, you could tech a 1-1 Blissey Prime for some more healing, but it is just an option for you.
I see that you picked up on the idea of using Energy Stream to its fullest with Juniper and Junk Arm, so good job on that! I think a few more hand refresh cards might be needed here, but I honestly don't see anything I could remove for it. Hope this helps you in the future, and by the way, your English is not bad.
