Smogon official tier: LC
Base Stats: 57 HP, 24 Attack, 86 Defense, 24 Sp. Attack, 86 Sp. Defense, 23 Speed
Abilities: Levitate, Heatproof, Heavy Metal (HA)
“Usable” moves (according to Pokémon Showdown): Calm Mind, Charge Beam, Confuse Ray, Earthquake, Extrasensory, Façade, Flash Cannon, Frustration, Grass Knot, Gravity, Gyro Ball, Heavy Slam, Hidden Power (Electric, Fighting, Fire, Grass, Ice), Hypnosis, Iron Defense, Light Screen, Payback, Protect, Psychic, Psyshock, Rain Dance, Reflect, Rest, Return, Rock Polish, Rock Slide, Shadow Ball, Signal Beam, Sleep Talk, Solar Beam, Stealth Rock, Substitute, Sunny Day, Toxic, Trick, Trick Room
(Although not listed, Recycle is also a viable move)
Bronzor is a recent example of how one generation of changes can break a Pokémon. The main changes of concern in this case are the Steel-type nerf and the Knock Off buff. As of gen 6, Steel-types no longer resist Ghost or Dark, meaning that Bronzor is weak to Knock Off. Meanwhile, Knock Off has been buffed to base 65 power as opposed to the original 20 and, to make matters worse, if the target is holding an item, Knock Off is boosted to a whopping 97.5 base power, better than any other Dark-type move in existence! So, what was once a solid wall that could just sit still in front of a majority of the tier and perform its utility is now an unforgiven victim of the new “Knock Off on everything” meta. Sure, Berry Juice is now legal and Bronzor is one of the few bulky Pokémon with access to Recycle, but here’s the thing: an item affected by Knock Off cannot be Recycled. Add that to the fact that Berry Juice being affected by Knock Off takes priority over the consumption of the item.
In short, Bronzor’s typing has been greatly nerfed in a way that cannot be redeemed with its offensive stats, so its best (and possibly only) role is utility.
Bronzor @ Eviolite
EVs: 228 Def / 4 SpA / 228 SpD / 12 Spe
IVs: 0 Atk
– Flash Cannon
– Stealth Rock
Flash Cannon is the main STAB of choice due to not having immunities (unlike Psychic) and prevents it from being completely shut down by Taunt. Stealth Rock is a key component of team building and helps with offensive prowess. Toxic can allow Bronzor to get residual damage on Pokémon who can sit in front of its Flash Cannons all day (which is not hard to do because of that paltry base 24 Special Attack). Protect is there for scouting and to avoid Fake Out (however trivial it may be to a Steel-type), as well as to possibly stall out Toxic damage.
As mentioned, Recycle can be used in conjunction with Berry Juice for some serious recovery, but the combination falls short due to the omnipresence of Knock Off and Bronzor’s weakness to the move. You could also try Calm Mind with it, but I did so prior to coming up with the listed set and it just didn’t work. Trick Room is a good utility option for use in conjunction with a slow team. Dual screens (Reflect+Light Screen) are also good for utility, but be careful on whom you set up knowing how easy Bronzor can be killed this gen.
Lastly, here is a team with the set above (although do keep in mind that it is borderline): http://pastebin.com/ALBZvXKJ