Magnezone also takes care of Skarmory, the bane of physical sweepers everywhere. It also provides you with a somewhat slow brutal Volt Switch giving you the chance to chess with your opponent and possibly get a safe switch into Hawlucha, ready for setup.Also, Zard Y needs like 2-3 other teammates for support to function optimally (a Pursuit Trapper, a Defogger/Spinner, and maybe Hippowdon to reset weather and deal with some of its checks). Magnezone might be a better answer for Scizor and even Clefable with Magnet Pull and Steel-STAB, respectively.
Magnezone is also a good wallbreaker in general, there isn't much it can't fry with max modest Choice Specs stab moves. It's also got decent bulk and its typing allows it to come in on Latios and Azumarill, who just barely fails to score a 2HKO with Waterfall without Choice Band and is promptly toasted by an electric type attack.