They do seem under powered right now (or rather, not as overpowered as what is competitive). Is "Met Ball" a real thing? I am not well versed in the video games: haven't even played anything since Pearl, which I grew frustrated with and never finished... just like Emerald and Crystal before it. I did beat Yellow and Red and thoroughly played through Blue, so it isn't like I don't enjoy the games... but I digress. If it is real, I didn't see it on Bulbapedia or a general Google search. It might be good to explain either way. After all, even the obvious assumption for the ignorant (re: me =P) is a Metal-Type searching Poké Ball and... the deck you listed contains Metal-, Water- and Fire-Types. Personally I just think we need a Ban List, but it would probably be too large, and as the main point seems to be to provide a place to use all the relatively recent cards, it would probably be counterproductive. Exactly what support will Metal-Type decks need in a BW-On format? They have a Stage 2 to move Energy around, and if they can handle the split, can simultaneously be immune to attacks by Pokémon-EX! Whether regular Metal Energy cards, Special Energy cards that can provide [M] or a combination of both, there are some great single Energy attackers, so adding Energy acceleration would be overkill, and in BW-On you've got Ultra Ball, Heavy Ball and Level Ball. So... what kind of support do they really need? Do you mean the Politoed from XY: Furious Fists? It is still technically an unreleased card outside of Japan, so clarification is nice so I don't have to double check and make sure there isn't another noteworthy example (long time players like myself often remember potent cards from up to the beginning of the game). Politoad, or rather its Ability only works on Poliwag, Poliwhirl and Poliwrath: so do you mean you want a split Metal Stage 2 line with a similar gimmick, or one that works for all Metal-Types, which seems unlikely to be a good idea, especially for BW-On. That is a very powerful effect and for all the weaker cards it would bolster, it likely would make the average and some of the top attackers far too strong.