Meet the Bro Squad.
Broloom@ Focus Sash
Ability: Technician
EVs: 252 Atk / 140 Spe / 116 HP
IVs: 31/31/31/x/31/31
Adamant Nature
- Mach Punch
- Bullet Seed
- Spore
- Protect
>The original Bro. I started the team with him, and although I had my doubts as to how he'd perform, he more than impressed me in battle. His Bullet Seed is an invaluable tool, OHKOing numerous threats.
Breloom is never a Pokémon that I just bring to a match. I only bring him when he has a favourable matchup against 3 or 4 opposing team members, and he always pulls through. He's pretty standard, as Bros go. Mach Punch is Technician-boosted STAB priority, which is always good to have. Bullet Seed has come in more than handy in many situations, winning me a few games. Spore is that move that you love to hate. Protect is a must in VGC, letting me scout moves and stay alive when I'm at 1%. Adamant nature is to bulldoze things with my STABs. I confess that I ripped his EV spread from here,, and I have no idea what it does, but I like it.
BroDreigon@ Life Orb
Ability: Levitate
EVs: 252 SpA / 108 HP / 132 Def / 12 SDef / 4 Spe
IVs: 31/x/31/31/31/31
Modest Nature
- Draco Meteor
- Dark Pulse
- Fire Blast
- Protect
>The only Bro other than Broloom who's from the original team concept. He is actually my least-used member and honestly hasn't been that useful. But Bros don't give up on Bros.
Hydreigon is the only other surviving member of the concept team. He originally had Earth Power, but once Heatran hopped on board I switched to Fire Blast. Draco Meteor is a nice nuke, but since I don't lead with him too often, I find the Sp. Attack drop annoying. Dark Pulse is STAB and lets me kill Gengar. That's really the only thing keeping him here. Fire Blast is general covarage and hits Amoongus. Protect is mandatory. Modest nature hits as hard as possible. The EVs allow me to survive Breloom's Mach Punch. Mamoswine 2HKOs with Icicle Crash and 3HKOs with Ice Shard. I chose Life Orb over Choice Specs because I wanted to be able to switch between attacks and use Protect.
Metabro@ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 252 Spe / 4 HP
IVs: 31/31/31/x/31/31
Jolly Nature
- Bullet Punch
- Zen Headbutt
- Protect
- Ice Punch
>The only Mega on the team. Bulkier than Mawile, he offers valuable priority and a check to the Genies. He loves luring Fire attacks for Brotron.
I decided to go mono-Mega so that I could have 100% versatility when picking Pokémon. I originally had Mawile, but I liked the priority and speed of Metagross. I took inspiration from this report for the set. Bullet Punch over Iron Head so that I'm not hampered by Speed control. Zen Headbutt lets me threaten Rotom-W, Terrakion and the like. Protect lets me get the Speed increase and dodge Heat Wave. The final slot was between Hammer Arm and Ice Punch, but Ice Punch was chosen since I had few other ways of dealing with the Genies. I experimented with custom EVs, but decided "screw it" and went with a 252 spread. He's already bulky enough to survive most Earthquakes.
Talonbro@ Sitrus Berry
Ability: Gale Wings
EVs: 132 HP / 156 Atk / 84 Def / 4 SDef / 132 Spe
IVs: 31/31/31x/31/31
Jolly Nature
- Brave Bird
- Tailwind
- Will-o-Wisp
- Quick Guard Taunt
Talonbro's job is to support his slower teammates like Broloom and Azumabro. His Will-o-Wisps are an invaluable asset against Landorus-T, Metagross and the like.
Rather than all-out attacking Talonflame, I chose support. Talonbro is the replacement of Zapdos as the team's Tailwinder. Brave Bird is my only attack, but it's a good one. Tailwind is his sole purpose. If he survives, his next job is to Will-o-Wisp opposing physical attackers. Quick Guard just sorta came with the job, but I haven't had to use it yet. I might switch to Taunt. I honestly have no memory of where I got the EV spread and I'm looking for a new one. Sitrus Berry is experimental, I am also considering Sharp Beak and Leftovers.
EDIT: I changed Quick Guard to Taunt. It lets me shut down Follow Me/Rage Powder shenanigans, Substitute Aegislash, etc.
Azumabro@ Assault Vest
Ability: Huge Power
EVs: 252 Atk / 20 Def / 32 SDef / 196 HP / 8 Spe
Adamant Nature
- Aqua Jet
- Waterfall
- Play Rough
- Superpower
>This is my favorite Bro. He eats Thunderbolts for breakfast. I like leading with him and Metabro for double priority, and he covers his Fire weakness. True Bros stick together.
My Mawile replacement and bulky Water. It was between him and Rotom-W, but Azumarill won due to Fairy STAB. Aqua Jet is good priority, while Waterfall hits harder but slower. Play Rough is an all-around good move. I have not yet use Superpower in battle, so I am also considering Knock Off to slow down Scarfed Landorus. The EV spread lets him survive Double-Edge from Jolly Mega Salamence, as well as speed creep Mega Mawile and make him all-around bulkier. I chose Assault Vest over Belly Drum because BD Azu requires too much support. He is commonly paired with Raichu, and I thought that if I were to have both I might as well just use Rotom-W and another Fairy. I also like the dependability of AV Azu.
Brotran@ Shuca Berry
Ability: Flash Fire
EVs: 252 SpA / 196 HP / 60 SDef
IVs: 31/7/19/31/31/31
Modest Nature
- Heat Wave
- Flash Cannon
- Earth Power
- Protect
>I caught Brotran in Bromega Ruby before I knew I would need perfect IVs on him. I was relieved when I found that he had 4 perfect IVs and a decent Defence IV. He's my lucky Bro.
The final Bro is Brotran. He fulfills many different roles. Sometimes he acts as my lead, as his excellent coverage comes in handy, but I usually bring him in the back of matches with Metabro, since he can switch into things like Hydreigon's Fire blast and Charizard's Heat Wave to get the Flash Fire boost. Heat Wave is spread STAB. Flash Cannon lets me deal with Fairies and Mamoswine. Earth Power is for opposing Fire- and Electric- types. Protect lets me dodge attacks. Thanks to Scilicet for suggesting Shuca Berry, it lets me survive Earthquakes from Landorus-T, Mamoswine and Mega Garchomp. The EVs allow me to have fully operational special attacks and survive Specs Sylveon HP Ground.
Teambuilding, threatlist and replays continued in answer!